/*!
 * Vue.js v2.5.16
 * (c) 2014-2018 Evan You
 * Released under the MIT License.
 */
;(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined'
		? (module.exports = factory())
		: typeof define === 'function' && define.amd
		? define(factory)
		: (global.Vue = factory())
})(this, function () {
	'use strict'

	/*  */

	var emptyObject = Object.freeze({})

	// these helpers produces better vm code in JS engines due to their
	// explicitness and function inlining
	function isUndef(v) {
		return v === undefined || v === null
	}

	function isDef(v) {
		return v !== undefined && v !== null
	}

	function isTrue(v) {
		return v === true
	}

	function isFalse(v) {
		return v === false
	}

	/**
	 * Check if value is primitive
	 */
	function isPrimitive(value) {
		return (
			typeof value === 'string' ||
			typeof value === 'number' ||
			// $flow-disable-line
			typeof value === 'symbol' ||
			typeof value === 'boolean'
		)
	}

	/**
	 * Quick object check - this is primarily used to tell
	 * Objects from primitive values when we know the value
	 * is a JSON-compliant type.
	 */
	function isObject(obj) {
		return obj !== null && typeof obj === 'object'
	}

	/**
	 * Get the raw type string of a value e.g. [object Object]
	 */
	var _toString = Object.prototype.toString

	function toRawType(value) {
		return _toString.call(value).slice(8, -1)
	}

	/**
	 * Strict object type check. Only returns true
	 * for plain JavaScript objects.
	 */
	function isPlainObject(obj) {
		return _toString.call(obj) === '[object Object]'
	}

	function isRegExp(v) {
		return _toString.call(v) === '[object RegExp]'
	}

	/**
	 * Check if val is a valid array index.
	 */
	function isValidArrayIndex(val) {
		var n = parseFloat(String(val))
		return n >= 0 && Math.floor(n) === n && isFinite(val)
	}

	/**
	 * Convert a value to a string that is actually rendered.
	 */
	function toString(val) {
		return val == null ? '' : typeof val === 'object' ? JSON.stringify(val, null, 2) : String(val)
	}

	/**
	 * Convert a input value to a number for persistence.
	 * If the conversion fails, return original string.
	 */
	function toNumber(val) {
		var n = parseFloat(val)
		return isNaN(n) ? val : n
	}

	/**
	 * Make a map and return a function for checking if a key
	 * is in that map.
	 */
	function makeMap(str, expectsLowerCase) {
		var map = Object.create(null)
		var list = str.split(',')
		for (var i = 0; i < list.length; i++) {
			map[list[i]] = true
		}
		return expectsLowerCase
			? function (val) {
					return map[val.toLowerCase()]
			  }
			: function (val) {
					return map[val]
			  }
	}

	/**
	 * Check if a tag is a built-in tag.
	 */
	var isBuiltInTag = makeMap('slot,component', true)

	/**
	 * Check if a attribute is a reserved attribute.
	 */
	var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is')

	/**
	 * Remove an item from an array
	 */
	function remove(arr, item) {
		if (arr.length) {
			var index = arr.indexOf(item)
			if (index > -1) {
				return arr.splice(index, 1)
			}
		}
	}

	/**
	 * Check whether the object has the property.
	 */
	var hasOwnProperty = Object.prototype.hasOwnProperty
	function hasOwn(obj, key) {
		return hasOwnProperty.call(obj, key)
	}

	/**
	 * Create a cached version of a pure function.
	 */
	function cached(fn) {
		var cache = Object.create(null)
		return function cachedFn(str) {
			var hit = cache[str]
			return hit || (cache[str] = fn(str))
		}
	}

	/**
	 * Camelize a hyphen-delimited string.
	 */
	var camelizeRE = /-(\w)/g
	var camelize = cached(function (str) {
		return str.replace(camelizeRE, function (_, c) {
			return c ? c.toUpperCase() : ''
		})
	})

	/**
	 * Capitalize a string.
	 */
	var capitalize = cached(function (str) {
		return str.charAt(0).toUpperCase() + str.slice(1)
	})

	/**
	 * Hyphenate a camelCase string.
	 */
	var hyphenateRE = /\B([A-Z])/g
	var hyphenate = cached(function (str) {
		return str.replace(hyphenateRE, '-$1').toLowerCase()
	})

	/**
	 * Simple bind polyfill for environments that do not support it... e.g.
	 * PhantomJS 1.x. Technically we don't need this anymore since native bind is
	 * now more performant in most browsers, but removing it would be breaking for
	 * code that was able to run in PhantomJS 1.x, so this must be kept for
	 * backwards compatibility.
	 */

	/* istanbul ignore next */
	function polyfillBind(fn, ctx) {
		function boundFn(a) {
			var l = arguments.length
			return l ? (l > 1 ? fn.apply(ctx, arguments) : fn.call(ctx, a)) : fn.call(ctx)
		}

		boundFn._length = fn.length
		return boundFn
	}

	function nativeBind(fn, ctx) {
		return fn.bind(ctx)
	}

	var bind = Function.prototype.bind ? nativeBind : polyfillBind

	/**
	 * Convert an Array-like object to a real Array.
	 */
	function toArray(list, start) {
		start = start || 0
		var i = list.length - start
		var ret = new Array(i)
		while (i--) {
			ret[i] = list[i + start]
		}
		return ret
	}

	/**
	 * Mix properties into target object.
	 */
	function extend(to, _from) {
		for (var key in _from) {
			to[key] = _from[key]
		}
		return to
	}

	/**
	 * Merge an Array of Objects into a single Object.
	 */
	function toObject(arr) {
		var res = {}
		for (var i = 0; i < arr.length; i++) {
			if (arr[i]) {
				extend(res, arr[i])
			}
		}
		return res
	}

	/**
	 * Perform no operation.
	 * Stubbing args to make Flow happy without leaving useless transpiled code
	 * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
	 */
	function noop(a, b, c) {}

	/**
	 * Always return false.
	 */
	var no = function (a, b, c) {
		return false
	}

	/**
	 * Return same value
	 */
	var identity = function (_) {
		return _
	}

	/**
	 * Generate a static keys string from compiler modules.
	 */
	function genStaticKeys(modules) {
		return modules
			.reduce(function (keys, m) {
				return keys.concat(m.staticKeys || [])
			}, [])
			.join(',')
	}

	/**
	 * Check if two values are loosely equal - that is,
	 * if they are plain objects, do they have the same shape?
	 */
	function looseEqual(a, b) {
		if (a === b) {
			return true
		}
		var isObjectA = isObject(a)
		var isObjectB = isObject(b)
		if (isObjectA && isObjectB) {
			try {
				var isArrayA = Array.isArray(a)
				var isArrayB = Array.isArray(b)
				if (isArrayA && isArrayB) {
					return (
						a.length === b.length &&
						a.every(function (e, i) {
							return looseEqual(e, b[i])
						})
					)
				} else if (!isArrayA && !isArrayB) {
					var keysA = Object.keys(a)
					var keysB = Object.keys(b)
					return (
						keysA.length === keysB.length &&
						keysA.every(function (key) {
							return looseEqual(a[key], b[key])
						})
					)
				} else {
					/* istanbul ignore next */
					return false
				}
			} catch (e) {
				/* istanbul ignore next */
				return false
			}
		} else if (!isObjectA && !isObjectB) {
			return String(a) === String(b)
		} else {
			return false
		}
	}

	function looseIndexOf(arr, val) {
		for (var i = 0; i < arr.length; i++) {
			if (looseEqual(arr[i], val)) {
				return i
			}
		}
		return -1
	}

	/**
	 * Ensure a function is called only once.
	 */
	function once(fn) {
		var called = false
		return function () {
			if (!called) {
				called = true
				fn.apply(this, arguments)
			}
		}
	}

	var SSR_ATTR = 'data-server-rendered'

	var ASSET_TYPES = ['component', 'directive', 'filter']

	var LIFECYCLE_HOOKS = [
		'beforeCreate',
		'created',
		'beforeMount',
		'mounted',
		'beforeUpdate',
		'updated',
		'beforeDestroy',
		'destroyed',
		'activated',
		'deactivated',
		'errorCaptured',
	]

	/*  */

	var config = {
		/**
		 * Option merge strategies (used in core/util/options)
		 */
		// $flow-disable-line
		optionMergeStrategies: Object.create(null),

		/**
		 * Whether to suppress warnings.
		 */
		silent: false,

		/**
		 * Show production mode tip message on boot?
		 */
		productionTip: 'development' !== 'production',

		/**
		 * Whether to enable devtools
		 */
		devtools: 'development' !== 'production',

		/**
		 * Whether to record perf
		 */
		performance: false,

		/**
		 * Error handler for watcher errors
		 */
		errorHandler: null,

		/**
		 * Warn handler for watcher warns
		 */
		warnHandler: null,

		/**
		 * Ignore certain custom elements
		 */
		ignoredElements: [],

		/**
		 * Custom user key aliases for v-on
		 */
		// $flow-disable-line
		keyCodes: Object.create(null),

		/**
		 * Check if a tag is reserved so that it cannot be registered as a
		 * component. This is platform-dependent and may be overwritten.
		 */
		isReservedTag: no,

		/**
		 * Check if an attribute is reserved so that it cannot be used as a component
		 * prop. This is platform-dependent and may be overwritten.
		 */
		isReservedAttr: no,

		/**
		 * Check if a tag is an unknown element.
		 * Platform-dependent.
		 */
		isUnknownElement: no,

		/**
		 * Get the namespace of an element
		 */
		getTagNamespace: noop,

		/**
		 * Parse the real tag name for the specific platform.
		 */
		parsePlatformTagName: identity,

		/**
		 * Check if an attribute must be bound using property, e.g. value
		 * Platform-dependent.
		 */
		mustUseProp: no,

		/**
		 * Exposed for legacy reasons
		 */
		_lifecycleHooks: LIFECYCLE_HOOKS,
	}

	/*  */

	/**
	 * Check if a string starts with $ or _
	 */
	function isReserved(str) {
		var c = (str + '').charCodeAt(0)
		return c === 0x24 || c === 0x5f
	}

	/**
	 * Define a property.
	 */
	function def(obj, key, val, enumerable) {
		Object.defineProperty(obj, key, {
			value: val,
			enumerable: !!enumerable,
			writable: true,
			configurable: true,
		})
	}

	/**
	 * Parse simple path.
	 */
	var bailRE = /[^\w.$]/
	function parsePath(path) {
		if (bailRE.test(path)) {
			return
		}
		var segments = path.split('.')
		return function (obj) {
			for (var i = 0; i < segments.length; i++) {
				if (!obj) {
					return
				}
				obj = obj[segments[i]]
			}
			return obj
		}
	}

	/*  */

	// can we use __proto__?
	var hasProto = '__proto__' in {}

	// Browser environment sniffing
	var inBrowser = typeof window !== 'undefined'
	var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform
	var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase()
	var UA = inBrowser && window.navigator.userAgent.toLowerCase()
	var isIE = UA && /msie|trident/.test(UA)
	var isIE9 = UA && UA.indexOf('msie 9.0') > 0
	var isEdge = UA && UA.indexOf('edge/') > 0
	var isAndroid = (UA && UA.indexOf('android') > 0) || weexPlatform === 'android'
	var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || weexPlatform === 'ios'
	var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge

	// Firefox has a "watch" function on Object.prototype...
	var nativeWatch = {}.watch

	var supportsPassive = false
	if (inBrowser) {
		try {
			var opts = {}
			Object.defineProperty(opts, 'passive', {
				get: function get() {
					/* istanbul ignore next */
					supportsPassive = true
				},
			}) // https://github.com/facebook/flow/issues/285
			window.addEventListener('test-passive', null, opts)
		} catch (e) {}
	}

	// this needs to be lazy-evaled because vue may be required before
	// vue-server-renderer can set VUE_ENV
	var _isServer
	var isServerRendering = function () {
		if (_isServer === undefined) {
			/* istanbul ignore if */
			if (!inBrowser && !inWeex && typeof global !== 'undefined') {
				// detect presence of vue-server-renderer and avoid
				// Webpack shimming the process
				_isServer = global['process'].env.VUE_ENV === 'server'
			} else {
				_isServer = false
			}
		}
		return _isServer
	}

	// detect devtools
	var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__

	/* istanbul ignore next */
	function isNative(Ctor) {
		return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
	}

	var hasSymbol = typeof Symbol !== 'undefined' && isNative(Symbol) && typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys)

	var _Set
	/* istanbul ignore if */ // $flow-disable-line
	if (typeof Set !== 'undefined' && isNative(Set)) {
		// use native Set when available.
		_Set = Set
	} else {
		// a non-standard Set polyfill that only works with primitive keys.
		_Set = (function () {
			function Set() {
				this.set = Object.create(null)
			}
			Set.prototype.has = function has(key) {
				return this.set[key] === true
			}
			Set.prototype.add = function add(key) {
				this.set[key] = true
			}
			Set.prototype.clear = function clear() {
				this.set = Object.create(null)
			}

			return Set
		})()
	}

	/*  */

	var warn = noop
	var tip = noop
	var generateComponentTrace = noop // work around flow check
	var formatComponentName = noop

	{
		var hasConsole = typeof console !== 'undefined'
		var classifyRE = /(?:^|[-_])(\w)/g
		var classify = function (str) {
			return str
				.replace(classifyRE, function (c) {
					return c.toUpperCase()
				})
				.replace(/[-_]/g, '')
		}

		warn = function (msg, vm) {
			var trace = vm ? generateComponentTrace(vm) : ''

			if (config.warnHandler) {
				config.warnHandler.call(null, msg, vm, trace)
			} else if (hasConsole && !config.silent) {
				console.error('[Vue warn]: ' + msg + trace)
			}
		}

		tip = function (msg, vm) {
			if (hasConsole && !config.silent) {
				console.warn('[Vue tip]: ' + msg + (vm ? generateComponentTrace(vm) : ''))
			}
		}

		formatComponentName = function (vm, includeFile) {
			if (vm.$root === vm) {
				return '<Root>'
			}
			var options = typeof vm === 'function' && vm.cid != null ? vm.options : vm._isVue ? vm.$options || vm.constructor.options : vm || {}
			var name = options.name || options._componentTag
			var file = options.__file
			if (!name && file) {
				var match = file.match(/([^/\\]+)\.vue$/)
				name = match && match[1]
			}

			return (name ? '<' + classify(name) + '>' : '<Anonymous>') + (file && includeFile !== false ? ' at ' + file : '')
		}

		var repeat = function (str, n) {
			var res = ''
			while (n) {
				if (n % 2 === 1) {
					res += str
				}
				if (n > 1) {
					str += str
				}
				n >>= 1
			}
			return res
		}

		generateComponentTrace = function (vm) {
			if (vm._isVue && vm.$parent) {
				var tree = []
				var currentRecursiveSequence = 0
				while (vm) {
					if (tree.length > 0) {
						var last = tree[tree.length - 1]
						if (last.constructor === vm.constructor) {
							currentRecursiveSequence++
							vm = vm.$parent
							continue
						} else if (currentRecursiveSequence > 0) {
							tree[tree.length - 1] = [last, currentRecursiveSequence]
							currentRecursiveSequence = 0
						}
					}
					tree.push(vm)
					vm = vm.$parent
				}
				return (
					'\n\nfound in\n\n' +
					tree
						.map(function (vm, i) {
							return (
								'' +
								(i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) +
								(Array.isArray(vm) ? formatComponentName(vm[0]) + '... (' + vm[1] + ' recursive calls)' : formatComponentName(vm))
							)
						})
						.join('\n')
				)
			} else {
				return '\n\n(found in ' + formatComponentName(vm) + ')'
			}
		}
	}

	/*  */

	var uid = 0

	/**
	 * A dep is an observable that can have multiple
	 * directives subscribing to it.
	 */
	var Dep = function Dep() {
		this.id = uid++
		this.subs = []
	}

	Dep.prototype.addSub = function addSub(sub) {
		this.subs.push(sub)
	}

	Dep.prototype.removeSub = function removeSub(sub) {
		remove(this.subs, sub)
	}

	Dep.prototype.depend = function depend() {
		if (Dep.target) {
			Dep.target.addDep(this)
		}
	}

	Dep.prototype.notify = function notify() {
		// stabilize the subscriber list first
		var subs = this.subs.slice()
		for (var i = 0, l = subs.length; i < l; i++) {
			subs[i].update()
		}
	}

	// the current target watcher being evaluated.
	// this is globally unique because there could be only one
	// watcher being evaluated at any time.
	Dep.target = null
	var targetStack = []

	function pushTarget(_target) {
		if (Dep.target) {
			targetStack.push(Dep.target)
		}
		Dep.target = _target
	}

	function popTarget() {
		Dep.target = targetStack.pop()
	}

	/*  */

	var VNode = function VNode(tag, data, children, text, elm, context, componentOptions, asyncFactory) {
		this.tag = tag
		this.data = data
		this.children = children
		this.text = text
		this.elm = elm
		this.ns = undefined
		this.context = context
		this.fnContext = undefined
		this.fnOptions = undefined
		this.fnScopeId = undefined
		this.key = data && data.key
		this.componentOptions = componentOptions
		this.componentInstance = undefined
		this.parent = undefined
		this.raw = false
		this.isStatic = false
		this.isRootInsert = true
		this.isComment = false
		this.isCloned = false
		this.isOnce = false
		this.asyncFactory = asyncFactory
		this.asyncMeta = undefined
		this.isAsyncPlaceholder = false
	}

	var prototypeAccessors = { child: { configurable: true } }

	// DEPRECATED: alias for componentInstance for backwards compat.
	/* istanbul ignore next */
	prototypeAccessors.child.get = function () {
		return this.componentInstance
	}

	Object.defineProperties(VNode.prototype, prototypeAccessors)

	var createEmptyVNode = function (text) {
		if (text === void 0) text = ''

		var node = new VNode()
		node.text = text
		node.isComment = true
		return node
	}

	function createTextVNode(val) {
		return new VNode(undefined, undefined, undefined, String(val))
	}

	// optimized shallow clone
	// used for static nodes and slot nodes because they may be reused across
	// multiple renders, cloning them avoids errors when DOM manipulations rely
	// on their elm reference.
	function cloneVNode(vnode) {
		var cloned = new VNode(vnode.tag, vnode.data, vnode.children, vnode.text, vnode.elm, vnode.context, vnode.componentOptions, vnode.asyncFactory)
		cloned.ns = vnode.ns
		cloned.isStatic = vnode.isStatic
		cloned.key = vnode.key
		cloned.isComment = vnode.isComment
		cloned.fnContext = vnode.fnContext
		cloned.fnOptions = vnode.fnOptions
		cloned.fnScopeId = vnode.fnScopeId
		cloned.isCloned = true
		return cloned
	}

	/*
	 * not type checking this file because flow doesn't play well with
	 * dynamically accessing methods on Array prototype
	 */

	var arrayProto = Array.prototype
	var arrayMethods = Object.create(arrayProto)

	var methodsToPatch = ['push', 'pop', 'shift', 'unshift', 'splice', 'sort', 'reverse']

	/**
	 * Intercept mutating methods and emit events
	 */
	methodsToPatch.forEach(function (method) {
		// cache original method
		var original = arrayProto[method]
		def(arrayMethods, method, function mutator() {
			var args = [],
				len = arguments.length
			while (len--) args[len] = arguments[len]

			var result = original.apply(this, args)
			var ob = this.__ob__
			var inserted
			switch (method) {
				case 'push':
				case 'unshift':
					inserted = args
					break
				case 'splice':
					inserted = args.slice(2)
					break
			}
			if (inserted) {
				ob.observeArray(inserted)
			}
			// notify change
			ob.dep.notify()
			return result
		})
	})

	/*  */

	var arrayKeys = Object.getOwnPropertyNames(arrayMethods)

	/**
	 * In some cases we may want to disable observation inside a component's
	 * update computation.
	 */
	var shouldObserve = true

	function toggleObserving(value) {
		shouldObserve = value
	}

	/**
	 * Observer class that is attached to each observed
	 * object. Once attached, the observer converts the target
	 * object's property keys into getter/setters that
	 * collect dependencies and dispatch updates.
	 */
	var Observer = function Observer(value) {
		this.value = value
		this.dep = new Dep()
		this.vmCount = 0
		def(value, '__ob__', this)
		if (Array.isArray(value)) {
			var augment = hasProto ? protoAugment : copyAugment
			augment(value, arrayMethods, arrayKeys)
			this.observeArray(value)
		} else {
			this.walk(value)
		}
	}

	/**
	 * Walk through each property and convert them into
	 * getter/setters. This method should only be called when
	 * value type is Object.
	 */
	Observer.prototype.walk = function walk(obj) {
		var keys = Object.keys(obj)
		for (var i = 0; i < keys.length; i++) {
			defineReactive(obj, keys[i])
		}
	}

	/**
	 * Observe a list of Array items.
	 */
	Observer.prototype.observeArray = function observeArray(items) {
		for (var i = 0, l = items.length; i < l; i++) {
			observe(items[i])
		}
	}

	// helpers

	/**
	 * Augment an target Object or Array by intercepting
	 * the prototype chain using __proto__
	 */
	function protoAugment(target, src, keys) {
		/* eslint-disable no-proto */
		target.__proto__ = src
		/* eslint-enable no-proto */
	}

	/**
	 * Augment an target Object or Array by defining
	 * hidden properties.
	 */
	/* istanbul ignore next */
	function copyAugment(target, src, keys) {
		for (var i = 0, l = keys.length; i < l; i++) {
			var key = keys[i]
			def(target, key, src[key])
		}
	}

	/**
	 * Attempt to create an observer instance for a value,
	 * returns the new observer if successfully observed,
	 * or the existing observer if the value already has one.
	 */
	function observe(value, asRootData) {
		if (!isObject(value) || value instanceof VNode) {
			return
		}
		var ob
		if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
			ob = value.__ob__
		} else if (shouldObserve && !isServerRendering() && (Array.isArray(value) || isPlainObject(value)) && Object.isExtensible(value) && !value._isVue) {
			ob = new Observer(value)
		}
		if (asRootData && ob) {
			ob.vmCount++
		}
		return ob
	}

	/**
	 * Define a reactive property on an Object.
	 */
	function defineReactive(obj, key, val, customSetter, shallow) {
		var dep = new Dep()

		var property = Object.getOwnPropertyDescriptor(obj, key)
		if (property && property.configurable === false) {
			return
		}

		// cater for pre-defined getter/setters
		var getter = property && property.get
		if (!getter && arguments.length === 2) {
			val = obj[key]
		}
		var setter = property && property.set

		var childOb = !shallow && observe(val)
		Object.defineProperty(obj, key, {
			enumerable: true,
			configurable: true,
			get: function reactiveGetter() {
				var value = getter ? getter.call(obj) : val
				if (Dep.target) {
					dep.depend()
					if (childOb) {
						childOb.dep.depend()
						if (Array.isArray(value)) {
							dependArray(value)
						}
					}
				}
				return value
			},
			set: function reactiveSetter(newVal) {
				var value = getter ? getter.call(obj) : val
				/* eslint-disable no-self-compare */
				if (newVal === value || (newVal !== newVal && value !== value)) {
					return
				}
				/* eslint-enable no-self-compare */
				if ('development' !== 'production' && customSetter) {
					customSetter()
				}
				if (setter) {
					setter.call(obj, newVal)
				} else {
					val = newVal
				}
				childOb = !shallow && observe(newVal)
				dep.notify()
			},
		})
	}

	/**
	 * Set a property on an object. Adds the new property and
	 * triggers change notification if the property doesn't
	 * already exist.
	 */
	function set(target, key, val) {
		if ('development' !== 'production' && (isUndef(target) || isPrimitive(target))) {
			warn('Cannot set reactive property on undefined, null, or primitive value: ' + target)
		}
		if (Array.isArray(target) && isValidArrayIndex(key)) {
			target.length = Math.max(target.length, key)
			target.splice(key, 1, val)
			return val
		}
		if (key in target && !(key in Object.prototype)) {
			target[key] = val
			return val
		}
		var ob = target.__ob__
		if (target._isVue || (ob && ob.vmCount)) {
			'development' !== 'production' &&
				warn('Avoid adding reactive properties to a Vue instance or its root $data ' + 'at runtime - declare it upfront in the data option.')
			return val
		}
		if (!ob) {
			target[key] = val
			return val
		}
		defineReactive(ob.value, key, val)
		ob.dep.notify()
		return val
	}

	/**
	 * Delete a property and trigger change if necessary.
	 */
	function del(target, key) {
		if ('development' !== 'production' && (isUndef(target) || isPrimitive(target))) {
			warn('Cannot delete reactive property on undefined, null, or primitive value: ' + target)
		}
		if (Array.isArray(target) && isValidArrayIndex(key)) {
			target.splice(key, 1)
			return
		}
		var ob = target.__ob__
		if (target._isVue || (ob && ob.vmCount)) {
			'development' !== 'production' && warn('Avoid deleting properties on a Vue instance or its root $data ' + '- just set it to null.')
			return
		}
		if (!hasOwn(target, key)) {
			return
		}
		delete target[key]
		if (!ob) {
			return
		}
		ob.dep.notify()
	}

	/**
	 * Collect dependencies on array elements when the array is touched, since
	 * we cannot intercept array element access like property getters.
	 */
	function dependArray(value) {
		for (var e = void 0, i = 0, l = value.length; i < l; i++) {
			e = value[i]
			e && e.__ob__ && e.__ob__.dep.depend()
			if (Array.isArray(e)) {
				dependArray(e)
			}
		}
	}

	/*  */

	/**
	 * Option overwriting strategies are functions that handle
	 * how to merge a parent option value and a child option
	 * value into the final value.
	 */
	var strats = config.optionMergeStrategies

	/**
	 * Options with restrictions
	 */
	{
		strats.el = strats.propsData = function (parent, child, vm, key) {
			if (!vm) {
				warn('option "' + key + '" can only be used during instance ' + 'creation with the `new` keyword.')
			}
			return defaultStrat(parent, child)
		}
	}

	/**
	 * Helper that recursively merges two data objects together.
	 */
	function mergeData(to, from) {
		if (!from) {
			return to
		}
		var key, toVal, fromVal
		var keys = Object.keys(from)
		for (var i = 0; i < keys.length; i++) {
			key = keys[i]
			toVal = to[key]
			fromVal = from[key]
			if (!hasOwn(to, key)) {
				set(to, key, fromVal)
			} else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
				mergeData(toVal, fromVal)
			}
		}
		return to
	}

	/**
	 * Data
	 */
	function mergeDataOrFn(parentVal, childVal, vm) {
		if (!vm) {
			// in a Vue.extend merge, both should be functions
			if (!childVal) {
				return parentVal
			}
			if (!parentVal) {
				return childVal
			}
			// when parentVal & childVal are both present,
			// we need to return a function that returns the
			// merged result of both functions... no need to
			// check if parentVal is a function here because
			// it has to be a function to pass previous merges.
			return function mergedDataFn() {
				return mergeData(
					typeof childVal === 'function' ? childVal.call(this, this) : childVal,
					typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
				)
			}
		} else {
			return function mergedInstanceDataFn() {
				// instance merge
				var instanceData = typeof childVal === 'function' ? childVal.call(vm, vm) : childVal
				var defaultData = typeof parentVal === 'function' ? parentVal.call(vm, vm) : parentVal
				if (instanceData) {
					return mergeData(instanceData, defaultData)
				} else {
					return defaultData
				}
			}
		}
	}

	strats.data = function (parentVal, childVal, vm) {
		if (!vm) {
			if (childVal && typeof childVal !== 'function') {
				'development' !== 'production' &&
					warn('The "data" option should be a function ' + 'that returns a per-instance value in component ' + 'definitions.', vm)

				return parentVal
			}
			return mergeDataOrFn(parentVal, childVal)
		}

		return mergeDataOrFn(parentVal, childVal, vm)
	}

	/**
	 * Hooks and props are merged as arrays.
	 */
	function mergeHook(parentVal, childVal) {
		return childVal ? (parentVal ? parentVal.concat(childVal) : Array.isArray(childVal) ? childVal : [childVal]) : parentVal
	}

	LIFECYCLE_HOOKS.forEach(function (hook) {
		strats[hook] = mergeHook
	})

	/**
	 * Assets
	 *
	 * When a vm is present (instance creation), we need to do
	 * a three-way merge between constructor options, instance
	 * options and parent options.
	 */
	function mergeAssets(parentVal, childVal, vm, key) {
		var res = Object.create(parentVal || null)
		if (childVal) {
			'development' !== 'production' && assertObjectType(key, childVal, vm)
			return extend(res, childVal)
		} else {
			return res
		}
	}

	ASSET_TYPES.forEach(function (type) {
		strats[type + 's'] = mergeAssets
	})

	/**
	 * Watchers.
	 *
	 * Watchers hashes should not overwrite one
	 * another, so we merge them as arrays.
	 */
	strats.watch = function (parentVal, childVal, vm, key) {
		// work around Firefox's Object.prototype.watch...
		if (parentVal === nativeWatch) {
			parentVal = undefined
		}
		if (childVal === nativeWatch) {
			childVal = undefined
		}
		/* istanbul ignore if */
		if (!childVal) {
			return Object.create(parentVal || null)
		}
		{
			assertObjectType(key, childVal, vm)
		}
		if (!parentVal) {
			return childVal
		}
		var ret = {}
		extend(ret, parentVal)
		for (var key$1 in childVal) {
			var parent = ret[key$1]
			var child = childVal[key$1]
			if (parent && !Array.isArray(parent)) {
				parent = [parent]
			}
			ret[key$1] = parent ? parent.concat(child) : Array.isArray(child) ? child : [child]
		}
		return ret
	}

	/**
	 * Other object hashes.
	 */
	strats.props =
		strats.methods =
		strats.inject =
		strats.computed =
			function (parentVal, childVal, vm, key) {
				if (childVal && 'development' !== 'production') {
					assertObjectType(key, childVal, vm)
				}
				if (!parentVal) {
					return childVal
				}
				var ret = Object.create(null)
				extend(ret, parentVal)
				if (childVal) {
					extend(ret, childVal)
				}
				return ret
			}
	strats.provide = mergeDataOrFn

	/**
	 * Default strategy.
	 */
	var defaultStrat = function (parentVal, childVal) {
		return childVal === undefined ? parentVal : childVal
	}

	/**
	 * Validate component names
	 */
	function checkComponents(options) {
		for (var key in options.components) {
			validateComponentName(key)
		}
	}

	function validateComponentName(name) {
		if (!/^[a-zA-Z][\w-]*$/.test(name)) {
			warn(
				'Invalid component name: "' +
					name +
					'". Component names ' +
					'can only contain alphanumeric characters and the hyphen, ' +
					'and must start with a letter.'
			)
		}
		if (isBuiltInTag(name) || config.isReservedTag(name)) {
			warn('Do not use built-in or reserved HTML elements as component ' + 'id: ' + name)
		}
	}

	/**
	 * Ensure all props option syntax are normalized into the
	 * Object-based format.
	 */
	function normalizeProps(options, vm) {
		var props = options.props
		if (!props) {
			return
		}
		var res = {}
		var i, val, name
		if (Array.isArray(props)) {
			i = props.length
			while (i--) {
				val = props[i]
				if (typeof val === 'string') {
					name = camelize(val)
					res[name] = { type: null }
				} else {
					warn('props must be strings when using array syntax.')
				}
			}
		} else if (isPlainObject(props)) {
			for (var key in props) {
				val = props[key]
				name = camelize(key)
				res[name] = isPlainObject(val) ? val : { type: val }
			}
		} else {
			warn('Invalid value for option "props": expected an Array or an Object, ' + 'but got ' + toRawType(props) + '.', vm)
		}
		options.props = res
	}

	/**
	 * Normalize all injections into Object-based format
	 */
	function normalizeInject(options, vm) {
		var inject = options.inject
		if (!inject) {
			return
		}
		var normalized = (options.inject = {})
		if (Array.isArray(inject)) {
			for (var i = 0; i < inject.length; i++) {
				normalized[inject[i]] = { from: inject[i] }
			}
		} else if (isPlainObject(inject)) {
			for (var key in inject) {
				var val = inject[key]
				normalized[key] = isPlainObject(val) ? extend({ from: key }, val) : { from: val }
			}
		} else {
			warn('Invalid value for option "inject": expected an Array or an Object, ' + 'but got ' + toRawType(inject) + '.', vm)
		}
	}

	/**
	 * Normalize raw function directives into object format.
	 */
	function normalizeDirectives(options) {
		var dirs = options.directives
		if (dirs) {
			for (var key in dirs) {
				var def = dirs[key]
				if (typeof def === 'function') {
					dirs[key] = { bind: def, update: def }
				}
			}
		}
	}

	function assertObjectType(name, value, vm) {
		if (!isPlainObject(value)) {
			warn('Invalid value for option "' + name + '": expected an Object, ' + 'but got ' + toRawType(value) + '.', vm)
		}
	}

	/**
	 * Merge two option objects into a new one.
	 * Core utility used in both instantiation and inheritance.
	 */
	function mergeOptions(parent, child, vm) {
		{
			checkComponents(child)
		}

		if (typeof child === 'function') {
			child = child.options
		}

		normalizeProps(child, vm)
		normalizeInject(child, vm)
		normalizeDirectives(child)
		var extendsFrom = child.extends
		if (extendsFrom) {
			parent = mergeOptions(parent, extendsFrom, vm)
		}
		if (child.mixins) {
			for (var i = 0, l = child.mixins.length; i < l; i++) {
				parent = mergeOptions(parent, child.mixins[i], vm)
			}
		}
		var options = {}
		var key
		for (key in parent) {
			mergeField(key)
		}
		for (key in child) {
			if (!hasOwn(parent, key)) {
				mergeField(key)
			}
		}
		function mergeField(key) {
			var strat = strats[key] || defaultStrat
			options[key] = strat(parent[key], child[key], vm, key)
		}
		return options
	}

	/**
	 * Resolve an asset.
	 * This function is used because child instances need access
	 * to assets defined in its ancestor chain.
	 */
	function resolveAsset(options, type, id, warnMissing) {
		/* istanbul ignore if */
		if (typeof id !== 'string') {
			return
		}
		var assets = options[type]
		// check local registration variations first
		if (hasOwn(assets, id)) {
			return assets[id]
		}
		var camelizedId = camelize(id)
		if (hasOwn(assets, camelizedId)) {
			return assets[camelizedId]
		}
		var PascalCaseId = capitalize(camelizedId)
		if (hasOwn(assets, PascalCaseId)) {
			return assets[PascalCaseId]
		}
		// fallback to prototype chain
		var res = assets[id] || assets[camelizedId] || assets[PascalCaseId]
		if ('development' !== 'production' && warnMissing && !res) {
			warn('Failed to resolve ' + type.slice(0, -1) + ': ' + id, options)
		}
		return res
	}

	/*  */

	function validateProp(key, propOptions, propsData, vm) {
		var prop = propOptions[key]
		var absent = !hasOwn(propsData, key)
		var value = propsData[key]
		// boolean casting
		var booleanIndex = getTypeIndex(Boolean, prop.type)
		if (booleanIndex > -1) {
			if (absent && !hasOwn(prop, 'default')) {
				value = false
			} else if (value === '' || value === hyphenate(key)) {
				// only cast empty string / same name to boolean if
				// boolean has higher priority
				var stringIndex = getTypeIndex(String, prop.type)
				if (stringIndex < 0 || booleanIndex < stringIndex) {
					value = true
				}
			}
		}
		// check default value
		if (value === undefined) {
			value = getPropDefaultValue(vm, prop, key)
			// since the default value is a fresh copy,
			// make sure to observe it.
			var prevShouldObserve = shouldObserve
			toggleObserving(true)
			observe(value)
			toggleObserving(prevShouldObserve)
		}
		{
			assertProp(prop, key, value, vm, absent)
		}
		return value
	}

	/**
	 * Get the default value of a prop.
	 */
	function getPropDefaultValue(vm, prop, key) {
		// no default, return undefined
		if (!hasOwn(prop, 'default')) {
			return undefined
		}
		var def = prop.default
		// warn against non-factory defaults for Object & Array
		if ('development' !== 'production' && isObject(def)) {
			warn(
				'Invalid default value for prop "' + key + '": ' + 'Props with type Object/Array must use a factory function ' + 'to return the default value.',
				vm
			)
		}
		// the raw prop value was also undefined from previous render,
		// return previous default value to avoid unnecessary watcher trigger
		if (vm && vm.$options.propsData && vm.$options.propsData[key] === undefined && vm._props[key] !== undefined) {
			return vm._props[key]
		}
		// call factory function for non-Function types
		// a value is Function if its prototype is function even across different execution context
		return typeof def === 'function' && getType(prop.type) !== 'Function' ? def.call(vm) : def
	}

	/**
	 * Assert whether a prop is valid.
	 */
	function assertProp(prop, name, value, vm, absent) {
		if (prop.required && absent) {
			warn('Missing required prop: "' + name + '"', vm)
			return
		}
		if (value == null && !prop.required) {
			return
		}
		var type = prop.type
		var valid = !type || type === true
		var expectedTypes = []
		if (type) {
			if (!Array.isArray(type)) {
				type = [type]
			}
			for (var i = 0; i < type.length && !valid; i++) {
				var assertedType = assertType(value, type[i])
				expectedTypes.push(assertedType.expectedType || '')
				valid = assertedType.valid
			}
		}
		if (!valid) {
			warn(
				'Invalid prop: type check failed for prop "' +
					name +
					'".' +
					' Expected ' +
					expectedTypes.map(capitalize).join(', ') +
					', got ' +
					toRawType(value) +
					'.',
				vm
			)
			return
		}
		var validator = prop.validator
		if (validator) {
			if (!validator(value)) {
				warn('Invalid prop: custom validator check failed for prop "' + name + '".', vm)
			}
		}
	}

	var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/

	function assertType(value, type) {
		var valid
		var expectedType = getType(type)
		if (simpleCheckRE.test(expectedType)) {
			var t = typeof value
			valid = t === expectedType.toLowerCase()
			// for primitive wrapper objects
			if (!valid && t === 'object') {
				valid = value instanceof type
			}
		} else if (expectedType === 'Object') {
			valid = isPlainObject(value)
		} else if (expectedType === 'Array') {
			valid = Array.isArray(value)
		} else {
			valid = value instanceof type
		}
		return {
			valid: valid,
			expectedType: expectedType,
		}
	}

	/**
	 * Use function string name to check built-in types,
	 * because a simple equality check will fail when running
	 * across different vms / iframes.
	 */
	function getType(fn) {
		var match = fn && fn.toString().match(/^\s*function (\w+)/)
		return match ? match[1] : ''
	}

	function isSameType(a, b) {
		return getType(a) === getType(b)
	}

	function getTypeIndex(type, expectedTypes) {
		if (!Array.isArray(expectedTypes)) {
			return isSameType(expectedTypes, type) ? 0 : -1
		}
		for (var i = 0, len = expectedTypes.length; i < len; i++) {
			if (isSameType(expectedTypes[i], type)) {
				return i
			}
		}
		return -1
	}

	/*  */

	function handleError(err, vm, info) {
		if (vm) {
			var cur = vm
			while ((cur = cur.$parent)) {
				var hooks = cur.$options.errorCaptured
				if (hooks) {
					for (var i = 0; i < hooks.length; i++) {
						try {
							var capture = hooks[i].call(cur, err, vm, info) === false
							if (capture) {
								return
							}
						} catch (e) {
							globalHandleError(e, cur, 'errorCaptured hook')
						}
					}
				}
			}
		}
		globalHandleError(err, vm, info)
	}

	function globalHandleError(err, vm, info) {
		if (config.errorHandler) {
			try {
				return config.errorHandler.call(null, err, vm, info)
			} catch (e) {
				logError(e, null, 'config.errorHandler')
			}
		}
		logError(err, vm, info)
	}

	function logError(err, vm, info) {
		{
			warn('Error in ' + info + ': "' + err.toString() + '"', vm)
		}
		/* istanbul ignore else */
		if ((inBrowser || inWeex) && typeof console !== 'undefined') {
			console.error(err)
		} else {
			throw err
		}
	}

	/*  */
	/* globals MessageChannel */

	var callbacks = []
	var pending = false

	function flushCallbacks() {
		pending = false
		var copies = callbacks.slice(0)
		callbacks.length = 0
		for (var i = 0; i < copies.length; i++) {
			copies[i]()
		}
	}

	// Here we have async deferring wrappers using both microtasks and (macro) tasks.
	// In < 2.4 we used microtasks everywhere, but there are some scenarios where
	// microtasks have too high a priority and fire in between supposedly
	// sequential events (e.g. #4521, #6690) or even between bubbling of the same
	// event (#6566). However, using (macro) tasks everywhere also has subtle problems
	// when state is changed right before repaint (e.g. #6813, out-in transitions).
	// Here we use microtask by default, but expose a way to force (macro) task when
	// needed (e.g. in event handlers attached by v-on).
	var microTimerFunc
	var macroTimerFunc
	var useMacroTask = false

	// Determine (macro) task defer implementation.
	// Technically setImmediate should be the ideal choice, but it's only available
	// in IE. The only polyfill that consistently queues the callback after all DOM
	// events triggered in the same loop is by using MessageChannel.
	/* istanbul ignore if */
	if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
		macroTimerFunc = function () {
			setImmediate(flushCallbacks)
		}
	} else if (
		typeof MessageChannel !== 'undefined' &&
		(isNative(MessageChannel) ||
			// PhantomJS
			MessageChannel.toString() === '[object MessageChannelConstructor]')
	) {
		var channel = new MessageChannel()
		var port = channel.port2
		channel.port1.onmessage = flushCallbacks
		macroTimerFunc = function () {
			port.postMessage(1)
		}
	} else {
		/* istanbul ignore next */
		macroTimerFunc = function () {
			setTimeout(flushCallbacks, 0)
		}
	}

	// Determine microtask defer implementation.
	/* istanbul ignore next, $flow-disable-line */
	if (typeof Promise !== 'undefined' && isNative(Promise)) {
		var p = Promise.resolve()
		microTimerFunc = function () {
			p.then(flushCallbacks)
			// in problematic UIWebViews, Promise.then doesn't completely break, but
			// it can get stuck in a weird state where callbacks are pushed into the
			// microtask queue but the queue isn't being flushed, until the browser
			// needs to do some other work, e.g. handle a timer. Therefore we can
			// "force" the microtask queue to be flushed by adding an empty timer.
			if (isIOS) {
				setTimeout(noop)
			}
		}
	} else {
		// fallback to macro
		microTimerFunc = macroTimerFunc
	}

	/**
	 * Wrap a function so that if any code inside triggers state change,
	 * the changes are queued using a (macro) task instead of a microtask.
	 */
	function withMacroTask(fn) {
		return (
			fn._withTask ||
			(fn._withTask = function () {
				useMacroTask = true
				var res = fn.apply(null, arguments)
				useMacroTask = false
				return res
			})
		)
	}

	function nextTick(cb, ctx) {
		var _resolve
		callbacks.push(function () {
			if (cb) {
				try {
					cb.call(ctx)
				} catch (e) {
					handleError(e, ctx, 'nextTick')
				}
			} else if (_resolve) {
				_resolve(ctx)
			}
		})
		if (!pending) {
			pending = true
			if (useMacroTask) {
				macroTimerFunc()
			} else {
				microTimerFunc()
			}
		}
		// $flow-disable-line
		if (!cb && typeof Promise !== 'undefined') {
			return new Promise(function (resolve) {
				_resolve = resolve
			})
		}
	}

	/*  */

	var mark
	var measure

	{
		var perf = inBrowser && window.performance
		/* istanbul ignore if */
		if (perf && perf.mark && perf.measure && perf.clearMarks && perf.clearMeasures) {
			mark = function (tag) {
				return perf.mark(tag)
			}
			measure = function (name, startTag, endTag) {
				perf.measure(name, startTag, endTag)
				perf.clearMarks(startTag)
				perf.clearMarks(endTag)
				perf.clearMeasures(name)
			}
		}
	}

	/* not type checking this file because flow doesn't play well with Proxy */

	var initProxy

	{
		var allowedGlobals = makeMap(
			'Infinity,undefined,NaN,isFinite,isNaN,' +
				'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
				'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
				'require' // for Webpack/Browserify
		)

		var warnNonPresent = function (target, key) {
			warn(
				'Property or method "' +
					key +
					'" is not defined on the instance but ' +
					'referenced during render. Make sure that this property is reactive, ' +
					'either in the data option, or for class-based components, by ' +
					'initializing the property. ' +
					'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
				target
			)
		}

		var hasProxy = typeof Proxy !== 'undefined' && isNative(Proxy)

		if (hasProxy) {
			var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact')
			config.keyCodes = new Proxy(config.keyCodes, {
				set: function set(target, key, value) {
					if (isBuiltInModifier(key)) {
						warn('Avoid overwriting built-in modifier in config.keyCodes: .' + key)
						return false
					} else {
						target[key] = value
						return true
					}
				},
			})
		}

		var hasHandler = {
			has: function has(target, key) {
				var has = key in target
				var isAllowed = allowedGlobals(key) || key.charAt(0) === '_'
				if (!has && !isAllowed) {
					warnNonPresent(target, key)
				}
				return has || !isAllowed
			},
		}

		var getHandler = {
			get: function get(target, key) {
				if (typeof key === 'string' && !(key in target)) {
					warnNonPresent(target, key)
				}
				return target[key]
			},
		}

		initProxy = function initProxy(vm) {
			if (hasProxy) {
				// determine which proxy handler to use
				var options = vm.$options
				var handlers = options.render && options.render._withStripped ? getHandler : hasHandler
				vm._renderProxy = new Proxy(vm, handlers)
			} else {
				vm._renderProxy = vm
			}
		}
	}

	/*  */

	var seenObjects = new _Set()

	/**
	 * Recursively traverse an object to evoke all converted
	 * getters, so that every nested property inside the object
	 * is collected as a "deep" dependency.
	 */
	function traverse(val) {
		_traverse(val, seenObjects)
		seenObjects.clear()
	}

	function _traverse(val, seen) {
		var i, keys
		var isA = Array.isArray(val)
		if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
			return
		}
		if (val.__ob__) {
			var depId = val.__ob__.dep.id
			if (seen.has(depId)) {
				return
			}
			seen.add(depId)
		}
		if (isA) {
			i = val.length
			while (i--) {
				_traverse(val[i], seen)
			}
		} else {
			keys = Object.keys(val)
			i = keys.length
			while (i--) {
				_traverse(val[keys[i]], seen)
			}
		}
	}

	/*  */

	var normalizeEvent = cached(function (name) {
		var passive = name.charAt(0) === '&'
		name = passive ? name.slice(1) : name
		var once$$1 = name.charAt(0) === '~' // Prefixed last, checked first
		name = once$$1 ? name.slice(1) : name
		var capture = name.charAt(0) === '!'
		name = capture ? name.slice(1) : name
		return {
			name: name,
			once: once$$1,
			capture: capture,
			passive: passive,
		}
	})

	function createFnInvoker(fns) {
		function invoker() {
			var arguments$1 = arguments

			var fns = invoker.fns
			if (Array.isArray(fns)) {
				var cloned = fns.slice()
				for (var i = 0; i < cloned.length; i++) {
					cloned[i].apply(null, arguments$1)
				}
			} else {
				// return handler return value for single handlers
				return fns.apply(null, arguments)
			}
		}
		invoker.fns = fns
		return invoker
	}

	function updateListeners(on, oldOn, add, remove$$1, vm) {
		var name, def, cur, old, event
		for (name in on) {
			def = cur = on[name]
			old = oldOn[name]
			event = normalizeEvent(name)
			/* istanbul ignore if */
			if (isUndef(cur)) {
				'development' !== 'production' && warn('Invalid handler for event "' + event.name + '": got ' + String(cur), vm)
			} else if (isUndef(old)) {
				if (isUndef(cur.fns)) {
					cur = on[name] = createFnInvoker(cur)
				}
				add(event.name, cur, event.once, event.capture, event.passive, event.params)
			} else if (cur !== old) {
				old.fns = cur
				on[name] = old
			}
		}
		for (name in oldOn) {
			if (isUndef(on[name])) {
				event = normalizeEvent(name)
				remove$$1(event.name, oldOn[name], event.capture)
			}
		}
	}

	/*  */

	function mergeVNodeHook(def, hookKey, hook) {
		if (def instanceof VNode) {
			def = def.data.hook || (def.data.hook = {})
		}
		var invoker
		var oldHook = def[hookKey]

		function wrappedHook() {
			hook.apply(this, arguments)
			// important: remove merged hook to ensure it's called only once
			// and prevent memory leak
			remove(invoker.fns, wrappedHook)
		}

		if (isUndef(oldHook)) {
			// no existing hook
			invoker = createFnInvoker([wrappedHook])
		} else {
			/* istanbul ignore if */
			if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
				// already a merged invoker
				invoker = oldHook
				invoker.fns.push(wrappedHook)
			} else {
				// existing plain hook
				invoker = createFnInvoker([oldHook, wrappedHook])
			}
		}

		invoker.merged = true
		def[hookKey] = invoker
	}

	/*  */

	function extractPropsFromVNodeData(data, Ctor, tag) {
		// we are only extracting raw values here.
		// validation and default values are handled in the child
		// component itself.
		var propOptions = Ctor.options.props
		if (isUndef(propOptions)) {
			return
		}
		var res = {}
		var attrs = data.attrs
		var props = data.props
		if (isDef(attrs) || isDef(props)) {
			for (var key in propOptions) {
				var altKey = hyphenate(key)
				{
					var keyInLowerCase = key.toLowerCase()
					if (key !== keyInLowerCase && attrs && hasOwn(attrs, keyInLowerCase)) {
						tip(
							'Prop "' +
								keyInLowerCase +
								'" is passed to component ' +
								formatComponentName(tag || Ctor) +
								', but the declared prop name is' +
								' "' +
								key +
								'". ' +
								'Note that HTML attributes are case-insensitive and camelCased ' +
								'props need to use their kebab-case equivalents when using in-DOM ' +
								'templates. You should probably use "' +
								altKey +
								'" instead of "' +
								key +
								'".'
						)
					}
				}
				checkProp(res, props, key, altKey, true) || checkProp(res, attrs, key, altKey, false)
			}
		}
		return res
	}

	function checkProp(res, hash, key, altKey, preserve) {
		if (isDef(hash)) {
			if (hasOwn(hash, key)) {
				res[key] = hash[key]
				if (!preserve) {
					delete hash[key]
				}
				return true
			} else if (hasOwn(hash, altKey)) {
				res[key] = hash[altKey]
				if (!preserve) {
					delete hash[altKey]
				}
				return true
			}
		}
		return false
	}

	/*  */

	// The template compiler attempts to minimize the need for normalization by
	// statically analyzing the template at compile time.
	//
	// For plain HTML markup, normalization can be completely skipped because the
	// generated render function is guaranteed to return Array<VNode>. There are
	// two cases where extra normalization is needed:

	// 1. When the children contains components - because a functional component
	// may return an Array instead of a single root. In this case, just a simple
	// normalization is needed - if any child is an Array, we flatten the whole
	// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
	// because functional components already normalize their own children.
	function simpleNormalizeChildren(children) {
		for (var i = 0; i < children.length; i++) {
			if (Array.isArray(children[i])) {
				return Array.prototype.concat.apply([], children)
			}
		}
		return children
	}

	// 2. When the children contains constructs that always generated nested Arrays,
	// e.g. <template>, <slot>, v-for, or when the children is provided by user
	// with hand-written render functions / JSX. In such cases a full normalization
	// is needed to cater to all possible types of children values.
	function normalizeChildren(children) {
		return isPrimitive(children) ? [createTextVNode(children)] : Array.isArray(children) ? normalizeArrayChildren(children) : undefined
	}

	function isTextNode(node) {
		return isDef(node) && isDef(node.text) && isFalse(node.isComment)
	}

	function normalizeArrayChildren(children, nestedIndex) {
		var res = []
		var i, c, lastIndex, last
		for (i = 0; i < children.length; i++) {
			c = children[i]
			if (isUndef(c) || typeof c === 'boolean') {
				continue
			}
			lastIndex = res.length - 1
			last = res[lastIndex]
			//  nested
			if (Array.isArray(c)) {
				if (c.length > 0) {
					c = normalizeArrayChildren(c, (nestedIndex || '') + '_' + i)
					// merge adjacent text nodes
					if (isTextNode(c[0]) && isTextNode(last)) {
						res[lastIndex] = createTextVNode(last.text + c[0].text)
						c.shift()
					}
					res.push.apply(res, c)
				}
			} else if (isPrimitive(c)) {
				if (isTextNode(last)) {
					// merge adjacent text nodes
					// this is necessary for SSR hydration because text nodes are
					// essentially merged when rendered to HTML strings
					res[lastIndex] = createTextVNode(last.text + c)
				} else if (c !== '') {
					// convert primitive to vnode
					res.push(createTextVNode(c))
				}
			} else {
				if (isTextNode(c) && isTextNode(last)) {
					// merge adjacent text nodes
					res[lastIndex] = createTextVNode(last.text + c.text)
				} else {
					// default key for nested array children (likely generated by v-for)
					if (isTrue(children._isVList) && isDef(c.tag) && isUndef(c.key) && isDef(nestedIndex)) {
						c.key = '__vlist' + nestedIndex + '_' + i + '__'
					}
					res.push(c)
				}
			}
		}
		return res
	}

	/*  */

	function ensureCtor(comp, base) {
		if (comp.__esModule || (hasSymbol && comp[Symbol.toStringTag] === 'Module')) {
			comp = comp.default
		}
		return isObject(comp) ? base.extend(comp) : comp
	}

	function createAsyncPlaceholder(factory, data, context, children, tag) {
		var node = createEmptyVNode()
		node.asyncFactory = factory
		node.asyncMeta = { data: data, context: context, children: children, tag: tag }
		return node
	}

	function resolveAsyncComponent(factory, baseCtor, context) {
		if (isTrue(factory.error) && isDef(factory.errorComp)) {
			return factory.errorComp
		}

		if (isDef(factory.resolved)) {
			return factory.resolved
		}

		if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
			return factory.loadingComp
		}

		if (isDef(factory.contexts)) {
			// already pending
			factory.contexts.push(context)
		} else {
			var contexts = (factory.contexts = [context])
			var sync = true

			var forceRender = function () {
				for (var i = 0, l = contexts.length; i < l; i++) {
					contexts[i].$forceUpdate()
				}
			}

			var resolve = once(function (res) {
				// cache resolved
				factory.resolved = ensureCtor(res, baseCtor)
				// invoke callbacks only if this is not a synchronous resolve
				// (async resolves are shimmed as synchronous during SSR)
				if (!sync) {
					forceRender()
				}
			})

			var reject = once(function (reason) {
				'development' !== 'production' && warn('Failed to resolve async component: ' + String(factory) + (reason ? '\nReason: ' + reason : ''))
				if (isDef(factory.errorComp)) {
					factory.error = true
					forceRender()
				}
			})

			var res = factory(resolve, reject)

			if (isObject(res)) {
				if (typeof res.then === 'function') {
					// () => Promise
					if (isUndef(factory.resolved)) {
						res.then(resolve, reject)
					}
				} else if (isDef(res.component) && typeof res.component.then === 'function') {
					res.component.then(resolve, reject)

					if (isDef(res.error)) {
						factory.errorComp = ensureCtor(res.error, baseCtor)
					}

					if (isDef(res.loading)) {
						factory.loadingComp = ensureCtor(res.loading, baseCtor)
						if (res.delay === 0) {
							factory.loading = true
						} else {
							setTimeout(function () {
								if (isUndef(factory.resolved) && isUndef(factory.error)) {
									factory.loading = true
									forceRender()
								}
							}, res.delay || 200)
						}
					}

					if (isDef(res.timeout)) {
						setTimeout(function () {
							if (isUndef(factory.resolved)) {
								reject('timeout (' + res.timeout + 'ms)')
							}
						}, res.timeout)
					}
				}
			}

			sync = false
			// return in case resolved synchronously
			return factory.loading ? factory.loadingComp : factory.resolved
		}
	}

	/*  */

	function isAsyncPlaceholder(node) {
		return node.isComment && node.asyncFactory
	}

	/*  */

	function getFirstComponentChild(children) {
		if (Array.isArray(children)) {
			for (var i = 0; i < children.length; i++) {
				var c = children[i]
				if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
					return c
				}
			}
		}
	}

	/*  */

	/*  */

	function initEvents(vm) {
		vm._events = Object.create(null)
		vm._hasHookEvent = false
		// init parent attached events
		var listeners = vm.$options._parentListeners
		if (listeners) {
			updateComponentListeners(vm, listeners)
		}
	}

	var target

	function add(event, fn, once) {
		if (once) {
			target.$once(event, fn)
		} else {
			target.$on(event, fn)
		}
	}

	function remove$1(event, fn) {
		target.$off(event, fn)
	}

	function updateComponentListeners(vm, listeners, oldListeners) {
		target = vm
		updateListeners(listeners, oldListeners || {}, add, remove$1, vm)
		target = undefined
	}

	function eventsMixin(Vue) {
		var hookRE = /^hook:/
		Vue.prototype.$on = function (event, fn) {
			var this$1 = this

			var vm = this
			if (Array.isArray(event)) {
				for (var i = 0, l = event.length; i < l; i++) {
					this$1.$on(event[i], fn)
				}
			} else {
				;(vm._events[event] || (vm._events[event] = [])).push(fn)
				// optimize hook:event cost by using a boolean flag marked at registration
				// instead of a hash lookup
				if (hookRE.test(event)) {
					vm._hasHookEvent = true
				}
			}
			return vm
		}

		Vue.prototype.$once = function (event, fn) {
			var vm = this
			function on() {
				vm.$off(event, on)
				fn.apply(vm, arguments)
			}
			on.fn = fn
			vm.$on(event, on)
			return vm
		}

		Vue.prototype.$off = function (event, fn) {
			var this$1 = this

			var vm = this
			// all
			if (!arguments.length) {
				vm._events = Object.create(null)
				return vm
			}
			// array of events
			if (Array.isArray(event)) {
				for (var i = 0, l = event.length; i < l; i++) {
					this$1.$off(event[i], fn)
				}
				return vm
			}
			// specific event
			var cbs = vm._events[event]
			if (!cbs) {
				return vm
			}
			if (!fn) {
				vm._events[event] = null
				return vm
			}
			if (fn) {
				// specific handler
				var cb
				var i$1 = cbs.length
				while (i$1--) {
					cb = cbs[i$1]
					if (cb === fn || cb.fn === fn) {
						cbs.splice(i$1, 1)
						break
					}
				}
			}
			return vm
		}

		Vue.prototype.$emit = function (event) {
			var vm = this
			{
				var lowerCaseEvent = event.toLowerCase()
				if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
					tip(
						'Event "' +
							lowerCaseEvent +
							'" is emitted in component ' +
							formatComponentName(vm) +
							' but the handler is registered for "' +
							event +
							'". ' +
							'Note that HTML attributes are case-insensitive and you cannot use ' +
							'v-on to listen to camelCase events when using in-DOM templates. ' +
							'You should probably use "' +
							hyphenate(event) +
							'" instead of "' +
							event +
							'".'
					)
				}
			}
			var cbs = vm._events[event]
			if (cbs) {
				cbs = cbs.length > 1 ? toArray(cbs) : cbs
				var args = toArray(arguments, 1)
				for (var i = 0, l = cbs.length; i < l; i++) {
					try {
						cbs[i].apply(vm, args)
					} catch (e) {
						handleError(e, vm, 'event handler for "' + event + '"')
					}
				}
			}
			return vm
		}
	}

	/*  */

	/**
	 * Runtime helper for resolving raw children VNodes into a slot object.
	 */
	function resolveSlots(children, context) {
		var slots = {}
		if (!children) {
			return slots
		}
		for (var i = 0, l = children.length; i < l; i++) {
			var child = children[i]
			var data = child.data
			// remove slot attribute if the node is resolved as a Vue slot node
			if (data && data.attrs && data.attrs.slot) {
				delete data.attrs.slot
			}
			// named slots should only be respected if the vnode was rendered in the
			// same context.
			if ((child.context === context || child.fnContext === context) && data && data.slot != null) {
				var name = data.slot
				var slot = slots[name] || (slots[name] = [])
				if (child.tag === 'template') {
					slot.push.apply(slot, child.children || [])
				} else {
					slot.push(child)
				}
			} else {
				;(slots.default || (slots.default = [])).push(child)
			}
		}
		// ignore slots that contains only whitespace
		for (var name$1 in slots) {
			if (slots[name$1].every(isWhitespace)) {
				delete slots[name$1]
			}
		}
		return slots
	}

	function isWhitespace(node) {
		return (node.isComment && !node.asyncFactory) || node.text === ' '
	}

	function resolveScopedSlots(
		fns, // see flow/vnode
		res
	) {
		res = res || {}
		for (var i = 0; i < fns.length; i++) {
			if (Array.isArray(fns[i])) {
				resolveScopedSlots(fns[i], res)
			} else {
				res[fns[i].key] = fns[i].fn
			}
		}
		return res
	}

	/*  */

	var activeInstance = null
	var isUpdatingChildComponent = false

	function initLifecycle(vm) {
		var options = vm.$options

		// locate first non-abstract parent
		var parent = options.parent
		if (parent && !options.abstract) {
			while (parent.$options.abstract && parent.$parent) {
				parent = parent.$parent
			}
			parent.$children.push(vm)
		}

		vm.$parent = parent
		vm.$root = parent ? parent.$root : vm

		vm.$children = []
		vm.$refs = {}

		vm._watcher = null
		vm._inactive = null
		vm._directInactive = false
		vm._isMounted = false
		vm._isDestroyed = false
		vm._isBeingDestroyed = false
	}

	function lifecycleMixin(Vue) {
		Vue.prototype._update = function (vnode, hydrating) {
			var vm = this
			if (vm._isMounted) {
				callHook(vm, 'beforeUpdate')
			}
			var prevEl = vm.$el
			var prevVnode = vm._vnode
			var prevActiveInstance = activeInstance
			activeInstance = vm
			vm._vnode = vnode
			// Vue.prototype.__patch__ is injected in entry points
			// based on the rendering backend used.
			if (!prevVnode) {
				// initial render
				vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */, vm.$options._parentElm, vm.$options._refElm)
				// no need for the ref nodes after initial patch
				// this prevents keeping a detached DOM tree in memory (#5851)
				vm.$options._parentElm = vm.$options._refElm = null
			} else {
				// updates
				vm.$el = vm.__patch__(prevVnode, vnode)
			}
			activeInstance = prevActiveInstance
			// update __vue__ reference
			if (prevEl) {
				prevEl.__vue__ = null
			}
			if (vm.$el) {
				vm.$el.__vue__ = vm
			}
			// if parent is an HOC, update its $el as well
			if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
				vm.$parent.$el = vm.$el
			}
			// updated hook is called by the scheduler to ensure that children are
			// updated in a parent's updated hook.
		}

		Vue.prototype.$forceUpdate = function () {
			var vm = this
			if (vm._watcher) {
				vm._watcher.update()
			}
		}

		Vue.prototype.$destroy = function () {
			var vm = this
			if (vm._isBeingDestroyed) {
				return
			}
			callHook(vm, 'beforeDestroy')
			vm._isBeingDestroyed = true
			// remove self from parent
			var parent = vm.$parent
			if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
				remove(parent.$children, vm)
			}
			// teardown watchers
			if (vm._watcher) {
				vm._watcher.teardown()
			}
			var i = vm._watchers.length
			while (i--) {
				vm._watchers[i].teardown()
			}
			// remove reference from data ob
			// frozen object may not have observer.
			if (vm._data.__ob__) {
				vm._data.__ob__.vmCount--
			}
			// call the last hook...
			vm._isDestroyed = true
			// invoke destroy hooks on current rendered tree
			vm.__patch__(vm._vnode, null)
			// fire destroyed hook
			callHook(vm, 'destroyed')
			// turn off all instance listeners.
			vm.$off()
			// remove __vue__ reference
			if (vm.$el) {
				vm.$el.__vue__ = null
			}
			// release circular reference (#6759)
			if (vm.$vnode) {
				vm.$vnode.parent = null
			}
		}
	}

	function mountComponent(vm, el, hydrating) {
		vm.$el = el
		if (!vm.$options.render) {
			vm.$options.render = createEmptyVNode
			{
				/* istanbul ignore if */
				if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') || vm.$options.el || el) {
					warn(
						'You are using the runtime-only build of Vue where the template ' +
							'compiler is not available. Either pre-compile the templates into ' +
							'render functions, or use the compiler-included build.',
						vm
					)
				} else {
					warn('Failed to mount component: template or render function not defined.', vm)
				}
			}
		}
		callHook(vm, 'beforeMount')

		var updateComponent
		/* istanbul ignore if */
		if ('development' !== 'production' && config.performance && mark) {
			updateComponent = function () {
				var name = vm._name
				var id = vm._uid
				var startTag = 'vue-perf-start:' + id
				var endTag = 'vue-perf-end:' + id

				mark(startTag)
				var vnode = vm._render()
				mark(endTag)
				measure('vue ' + name + ' render', startTag, endTag)

				mark(startTag)
				vm._update(vnode, hydrating)
				mark(endTag)
				measure('vue ' + name + ' patch', startTag, endTag)
			}
		} else {
			updateComponent = function () {
				vm._update(vm._render(), hydrating)
			}
		}

		// we set this to vm._watcher inside the watcher's constructor
		// since the watcher's initial patch may call $forceUpdate (e.g. inside child
		// component's mounted hook), which relies on vm._watcher being already defined
		new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */)
		hydrating = false

		// manually mounted instance, call mounted on self
		// mounted is called for render-created child components in its inserted hook
		if (vm.$vnode == null) {
			vm._isMounted = true
			callHook(vm, 'mounted')
		}
		return vm
	}

	function updateChildComponent(vm, propsData, listeners, parentVnode, renderChildren) {
		{
			isUpdatingChildComponent = true
		}

		// determine whether component has slot children
		// we need to do this before overwriting $options._renderChildren
		var hasChildren = !!(
			(
				renderChildren || // has new static slots
				vm.$options._renderChildren || // has old static slots
				parentVnode.data.scopedSlots || // has new scoped slots
				vm.$scopedSlots !== emptyObject
			) // has old scoped slots
		)

		vm.$options._parentVnode = parentVnode
		vm.$vnode = parentVnode // update vm's placeholder node without re-render

		if (vm._vnode) {
			// update child tree's parent
			vm._vnode.parent = parentVnode
		}
		vm.$options._renderChildren = renderChildren

		// update $attrs and $listeners hash
		// these are also reactive so they may trigger child update if the child
		// used them during render
		vm.$attrs = parentVnode.data.attrs || emptyObject
		vm.$listeners = listeners || emptyObject

		// update props
		if (propsData && vm.$options.props) {
			toggleObserving(false)
			var props = vm._props
			var propKeys = vm.$options._propKeys || []
			for (var i = 0; i < propKeys.length; i++) {
				var key = propKeys[i]
				var propOptions = vm.$options.props // wtf flow?
				props[key] = validateProp(key, propOptions, propsData, vm)
			}
			toggleObserving(true)
			// keep a copy of raw propsData
			vm.$options.propsData = propsData
		}

		// update listeners
		listeners = listeners || emptyObject
		var oldListeners = vm.$options._parentListeners
		vm.$options._parentListeners = listeners
		updateComponentListeners(vm, listeners, oldListeners)

		// resolve slots + force update if has children
		if (hasChildren) {
			vm.$slots = resolveSlots(renderChildren, parentVnode.context)
			vm.$forceUpdate()
		}

		{
			isUpdatingChildComponent = false
		}
	}

	function isInInactiveTree(vm) {
		while (vm && (vm = vm.$parent)) {
			if (vm._inactive) {
				return true
			}
		}
		return false
	}

	function activateChildComponent(vm, direct) {
		if (direct) {
			vm._directInactive = false
			if (isInInactiveTree(vm)) {
				return
			}
		} else if (vm._directInactive) {
			return
		}
		if (vm._inactive || vm._inactive === null) {
			vm._inactive = false
			for (var i = 0; i < vm.$children.length; i++) {
				activateChildComponent(vm.$children[i])
			}
			callHook(vm, 'activated')
		}
	}

	function deactivateChildComponent(vm, direct) {
		if (direct) {
			vm._directInactive = true
			if (isInInactiveTree(vm)) {
				return
			}
		}
		if (!vm._inactive) {
			vm._inactive = true
			for (var i = 0; i < vm.$children.length; i++) {
				deactivateChildComponent(vm.$children[i])
			}
			callHook(vm, 'deactivated')
		}
	}

	function callHook(vm, hook) {
		// #7573 disable dep collection when invoking lifecycle hooks
		pushTarget()
		var handlers = vm.$options[hook]
		if (handlers) {
			for (var i = 0, j = handlers.length; i < j; i++) {
				try {
					handlers[i].call(vm)
				} catch (e) {
					handleError(e, vm, hook + ' hook')
				}
			}
		}
		if (vm._hasHookEvent) {
			vm.$emit('hook:' + hook)
		}
		popTarget()
	}

	/*  */

	var MAX_UPDATE_COUNT = 100

	var queue = []
	var activatedChildren = []
	var has = {}
	var circular = {}
	var waiting = false
	var flushing = false
	var index = 0

	/**
	 * Reset the scheduler's state.
	 */
	function resetSchedulerState() {
		index = queue.length = activatedChildren.length = 0
		has = {}
		{
			circular = {}
		}
		waiting = flushing = false
	}

	/**
	 * Flush both queues and run the watchers.
	 */
	function flushSchedulerQueue() {
		flushing = true
		var watcher, id

		// Sort queue before flush.
		// This ensures that:
		// 1. Components are updated from parent to child. (because parent is always
		//    created before the child)
		// 2. A component's user watchers are run before its render watcher (because
		//    user watchers are created before the render watcher)
		// 3. If a component is destroyed during a parent component's watcher run,
		//    its watchers can be skipped.
		queue.sort(function (a, b) {
			return a.id - b.id
		})

		// do not cache length because more watchers might be pushed
		// as we run existing watchers
		for (index = 0; index < queue.length; index++) {
			watcher = queue[index]
			id = watcher.id
			has[id] = null
			watcher.run()
			// in dev build, check and stop circular updates.
			if ('development' !== 'production' && has[id] != null) {
				circular[id] = (circular[id] || 0) + 1
				if (circular[id] > MAX_UPDATE_COUNT) {
					warn(
						'You may have an infinite update loop ' +
							(watcher.user ? 'in watcher with expression "' + watcher.expression + '"' : 'in a component render function.'),
						watcher.vm
					)
					break
				}
			}
		}

		// keep copies of post queues before resetting state
		var activatedQueue = activatedChildren.slice()
		var updatedQueue = queue.slice()

		resetSchedulerState()

		// call component updated and activated hooks
		callActivatedHooks(activatedQueue)
		callUpdatedHooks(updatedQueue)

		// devtool hook
		/* istanbul ignore if */
		if (devtools && config.devtools) {
			devtools.emit('flush')
		}
	}

	function callUpdatedHooks(queue) {
		var i = queue.length
		while (i--) {
			var watcher = queue[i]
			var vm = watcher.vm
			if (vm._watcher === watcher && vm._isMounted) {
				callHook(vm, 'updated')
			}
		}
	}

	/**
	 * Queue a kept-alive component that was activated during patch.
	 * The queue will be processed after the entire tree has been patched.
	 */
	function queueActivatedComponent(vm) {
		// setting _inactive to false here so that a render function can
		// rely on checking whether it's in an inactive tree (e.g. router-view)
		vm._inactive = false
		activatedChildren.push(vm)
	}

	function callActivatedHooks(queue) {
		for (var i = 0; i < queue.length; i++) {
			queue[i]._inactive = true
			activateChildComponent(queue[i], true /* true */)
		}
	}

	/**
	 * Push a watcher into the watcher queue.
	 * Jobs with duplicate IDs will be skipped unless it's
	 * pushed when the queue is being flushed.
	 */
	function queueWatcher(watcher) {
		var id = watcher.id
		if (has[id] == null) {
			has[id] = true
			if (!flushing) {
				queue.push(watcher)
			} else {
				// if already flushing, splice the watcher based on its id
				// if already past its id, it will be run next immediately.
				var i = queue.length - 1
				while (i > index && queue[i].id > watcher.id) {
					i--
				}
				queue.splice(i + 1, 0, watcher)
			}
			// queue the flush
			if (!waiting) {
				waiting = true
				nextTick(flushSchedulerQueue)
			}
		}
	}

	/*  */

	var uid$1 = 0

	/**
	 * A watcher parses an expression, collects dependencies,
	 * and fires callback when the expression value changes.
	 * This is used for both the $watch() api and directives.
	 */
	var Watcher = function Watcher(vm, expOrFn, cb, options, isRenderWatcher) {
		this.vm = vm
		if (isRenderWatcher) {
			vm._watcher = this
		}
		vm._watchers.push(this)
		// options
		if (options) {
			this.deep = !!options.deep
			this.user = !!options.user
			this.lazy = !!options.lazy
			this.sync = !!options.sync
		} else {
			this.deep = this.user = this.lazy = this.sync = false
		}
		this.cb = cb
		this.id = ++uid$1 // uid for batching
		this.active = true
		this.dirty = this.lazy // for lazy watchers
		this.deps = []
		this.newDeps = []
		this.depIds = new _Set()
		this.newDepIds = new _Set()
		this.expression = expOrFn.toString()
		// parse expression for getter
		if (typeof expOrFn === 'function') {
			this.getter = expOrFn
		} else {
			this.getter = parsePath(expOrFn)
			if (!this.getter) {
				this.getter = function () {}
				'development' !== 'production' &&
					warn(
						'Failed watching path: "' +
							expOrFn +
							'" ' +
							'Watcher only accepts simple dot-delimited paths. ' +
							'For full control, use a function instead.',
						vm
					)
			}
		}
		this.value = this.lazy ? undefined : this.get()
	}

	/**
	 * Evaluate the getter, and re-collect dependencies.
	 */
	Watcher.prototype.get = function get() {
		pushTarget(this)
		var value
		var vm = this.vm
		try {
			value = this.getter.call(vm, vm)
		} catch (e) {
			if (this.user) {
				handleError(e, vm, 'getter for watcher "' + this.expression + '"')
			} else {
				throw e
			}
		} finally {
			// "touch" every property so they are all tracked as
			// dependencies for deep watching
			if (this.deep) {
				traverse(value)
			}
			popTarget()
			this.cleanupDeps()
		}
		return value
	}

	/**
	 * Add a dependency to this directive.
	 */
	Watcher.prototype.addDep = function addDep(dep) {
		var id = dep.id
		if (!this.newDepIds.has(id)) {
			this.newDepIds.add(id)
			this.newDeps.push(dep)
			if (!this.depIds.has(id)) {
				dep.addSub(this)
			}
		}
	}

	/**
	 * Clean up for dependency collection.
	 */
	Watcher.prototype.cleanupDeps = function cleanupDeps() {
		var this$1 = this

		var i = this.deps.length
		while (i--) {
			var dep = this$1.deps[i]
			if (!this$1.newDepIds.has(dep.id)) {
				dep.removeSub(this$1)
			}
		}
		var tmp = this.depIds
		this.depIds = this.newDepIds
		this.newDepIds = tmp
		this.newDepIds.clear()
		tmp = this.deps
		this.deps = this.newDeps
		this.newDeps = tmp
		this.newDeps.length = 0
	}

	/**
	 * Subscriber interface.
	 * Will be called when a dependency changes.
	 */
	Watcher.prototype.update = function update() {
		/* istanbul ignore else */
		if (this.lazy) {
			this.dirty = true
		} else if (this.sync) {
			this.run()
		} else {
			queueWatcher(this)
		}
	}

	/**
	 * Scheduler job interface.
	 * Will be called by the scheduler.
	 */
	Watcher.prototype.run = function run() {
		if (this.active) {
			var value = this.get()
			if (
				value !== this.value ||
				// Deep watchers and watchers on Object/Arrays should fire even
				// when the value is the same, because the value may
				// have mutated.
				isObject(value) ||
				this.deep
			) {
				// set new value
				var oldValue = this.value
				this.value = value
				if (this.user) {
					try {
						this.cb.call(this.vm, value, oldValue)
					} catch (e) {
						handleError(e, this.vm, 'callback for watcher "' + this.expression + '"')
					}
				} else {
					this.cb.call(this.vm, value, oldValue)
				}
			}
		}
	}

	/**
	 * Evaluate the value of the watcher.
	 * This only gets called for lazy watchers.
	 */
	Watcher.prototype.evaluate = function evaluate() {
		this.value = this.get()
		this.dirty = false
	}

	/**
	 * Depend on all deps collected by this watcher.
	 */
	Watcher.prototype.depend = function depend() {
		var this$1 = this

		var i = this.deps.length
		while (i--) {
			this$1.deps[i].depend()
		}
	}

	/**
	 * Remove self from all dependencies' subscriber list.
	 */
	Watcher.prototype.teardown = function teardown() {
		var this$1 = this

		if (this.active) {
			// remove self from vm's watcher list
			// this is a somewhat expensive operation so we skip it
			// if the vm is being destroyed.
			if (!this.vm._isBeingDestroyed) {
				remove(this.vm._watchers, this)
			}
			var i = this.deps.length
			while (i--) {
				this$1.deps[i].removeSub(this$1)
			}
			this.active = false
		}
	}

	/*  */

	var sharedPropertyDefinition = {
		enumerable: true,
		configurable: true,
		get: noop,
		set: noop,
	}

	function proxy(target, sourceKey, key) {
		sharedPropertyDefinition.get = function proxyGetter() {
			return this[sourceKey][key]
		}
		sharedPropertyDefinition.set = function proxySetter(val) {
			this[sourceKey][key] = val
		}
		Object.defineProperty(target, key, sharedPropertyDefinition)
	}

	function initState(vm) {
		vm._watchers = []
		var opts = vm.$options
		if (opts.props) {
			initProps(vm, opts.props)
		}
		if (opts.methods) {
			initMethods(vm, opts.methods)
		}
		if (opts.data) {
			initData(vm)
		} else {
			observe((vm._data = {}), true /* asRootData */)
		}
		if (opts.computed) {
			initComputed(vm, opts.computed)
		}
		if (opts.watch && opts.watch !== nativeWatch) {
			initWatch(vm, opts.watch)
		}
	}

	function initProps(vm, propsOptions) {
		var propsData = vm.$options.propsData || {}
		var props = (vm._props = {})
		// cache prop keys so that future props updates can iterate using Array
		// instead of dynamic object key enumeration.
		var keys = (vm.$options._propKeys = [])
		var isRoot = !vm.$parent
		// root instance props should be converted
		if (!isRoot) {
			toggleObserving(false)
		}
		var loop = function (key) {
			keys.push(key)
			var value = validateProp(key, propsOptions, propsData, vm)
			/* istanbul ignore else */
			{
				var hyphenatedKey = hyphenate(key)
				if (isReservedAttribute(hyphenatedKey) || config.isReservedAttr(hyphenatedKey)) {
					warn('"' + hyphenatedKey + '" is a reserved attribute and cannot be used as component prop.', vm)
				}
				defineReactive(props, key, value, function () {
					if (vm.$parent && !isUpdatingChildComponent) {
						warn(
							'Avoid mutating a prop directly since the value will be ' +
								'overwritten whenever the parent component re-renders. ' +
								"Instead, use a data or computed property based on the prop's " +
								'value. Prop being mutated: "' +
								key +
								'"',
							vm
						)
					}
				})
			}
			// static props are already proxied on the component's prototype
			// during Vue.extend(). We only need to proxy props defined at
			// instantiation here.
			if (!(key in vm)) {
				proxy(vm, '_props', key)
			}
		}

		for (var key in propsOptions) loop(key)
		toggleObserving(true)
	}

	function initData(vm) {
		var data = vm.$options.data
		data = vm._data = typeof data === 'function' ? getData(data, vm) : data || {}
		if (!isPlainObject(data)) {
			data = {}
			'development' !== 'production' &&
				warn('data functions should return an object:\n' + 'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function', vm)
		}
		// proxy data on instance
		var keys = Object.keys(data)
		var props = vm.$options.props
		var methods = vm.$options.methods
		var i = keys.length
		while (i--) {
			var key = keys[i]
			{
				if (methods && hasOwn(methods, key)) {
					warn('Method "' + key + '" has already been defined as a data property.', vm)
				}
			}
			if (props && hasOwn(props, key)) {
				'development' !== 'production' &&
					warn('The data property "' + key + '" is already declared as a prop. ' + 'Use prop default value instead.', vm)
			} else if (!isReserved(key)) {
				proxy(vm, '_data', key)
			}
		}
		// observe data
		observe(data, true /* asRootData */)
	}

	function getData(data, vm) {
		// #7573 disable dep collection when invoking data getters
		pushTarget()
		try {
			return data.call(vm, vm)
		} catch (e) {
			handleError(e, vm, 'data()')
			return {}
		} finally {
			popTarget()
		}
	}

	var computedWatcherOptions = { lazy: true }

	function initComputed(vm, computed) {
		// $flow-disable-line
		var watchers = (vm._computedWatchers = Object.create(null))
		// computed properties are just getters during SSR
		var isSSR = isServerRendering()

		for (var key in computed) {
			var userDef = computed[key]
			var getter = typeof userDef === 'function' ? userDef : userDef.get
			if ('development' !== 'production' && getter == null) {
				warn('Getter is missing for computed property "' + key + '".', vm)
			}

			if (!isSSR) {
				// create internal watcher for the computed property.
				watchers[key] = new Watcher(vm, getter || noop, noop, computedWatcherOptions)
			}

			// component-defined computed properties are already defined on the
			// component prototype. We only need to define computed properties defined
			// at instantiation here.
			if (!(key in vm)) {
				defineComputed(vm, key, userDef)
			} else {
				if (key in vm.$data) {
					warn('The computed property "' + key + '" is already defined in data.', vm)
				} else if (vm.$options.props && key in vm.$options.props) {
					warn('The computed property "' + key + '" is already defined as a prop.', vm)
				}
			}
		}
	}

	function defineComputed(target, key, userDef) {
		var shouldCache = !isServerRendering()
		if (typeof userDef === 'function') {
			sharedPropertyDefinition.get = shouldCache ? createComputedGetter(key) : userDef
			sharedPropertyDefinition.set = noop
		} else {
			sharedPropertyDefinition.get = userDef.get ? (shouldCache && userDef.cache !== false ? createComputedGetter(key) : userDef.get) : noop
			sharedPropertyDefinition.set = userDef.set ? userDef.set : noop
		}
		if ('development' !== 'production' && sharedPropertyDefinition.set === noop) {
			sharedPropertyDefinition.set = function () {
				warn('Computed property "' + key + '" was assigned to but it has no setter.', this)
			}
		}
		Object.defineProperty(target, key, sharedPropertyDefinition)
	}

	function createComputedGetter(key) {
		return function computedGetter() {
			var watcher = this._computedWatchers && this._computedWatchers[key]
			if (watcher) {
				if (watcher.dirty) {
					watcher.evaluate()
				}
				if (Dep.target) {
					watcher.depend()
				}
				return watcher.value
			}
		}
	}

	function initMethods(vm, methods) {
		var props = vm.$options.props
		for (var key in methods) {
			{
				if (methods[key] == null) {
					warn('Method "' + key + '" has an undefined value in the component definition. ' + 'Did you reference the function correctly?', vm)
				}
				if (props && hasOwn(props, key)) {
					warn('Method "' + key + '" has already been defined as a prop.', vm)
				}
				if (key in vm && isReserved(key)) {
					warn('Method "' + key + '" conflicts with an existing Vue instance method. ' + 'Avoid defining component methods that start with _ or $.')
				}
			}
			vm[key] = methods[key] == null ? noop : bind(methods[key], vm)
		}
	}

	function initWatch(vm, watch) {
		for (var key in watch) {
			var handler = watch[key]
			if (Array.isArray(handler)) {
				for (var i = 0; i < handler.length; i++) {
					createWatcher(vm, key, handler[i])
				}
			} else {
				createWatcher(vm, key, handler)
			}
		}
	}

	function createWatcher(vm, expOrFn, handler, options) {
		if (isPlainObject(handler)) {
			options = handler
			handler = handler.handler
		}
		if (typeof handler === 'string') {
			handler = vm[handler]
		}
		return vm.$watch(expOrFn, handler, options)
	}

	function stateMixin(Vue) {
		// flow somehow has problems with directly declared definition object
		// when using Object.defineProperty, so we have to procedurally build up
		// the object here.
		var dataDef = {}
		dataDef.get = function () {
			return this._data
		}
		var propsDef = {}
		propsDef.get = function () {
			return this._props
		}
		{
			dataDef.set = function (newData) {
				warn('Avoid replacing instance root $data. ' + 'Use nested data properties instead.', this)
			}
			propsDef.set = function () {
				warn('$props is readonly.', this)
			}
		}
		Object.defineProperty(Vue.prototype, '$data', dataDef)
		Object.defineProperty(Vue.prototype, '$props', propsDef)

		Vue.prototype.$set = set
		Vue.prototype.$delete = del

		Vue.prototype.$watch = function (expOrFn, cb, options) {
			var vm = this
			if (isPlainObject(cb)) {
				return createWatcher(vm, expOrFn, cb, options)
			}
			options = options || {}
			options.user = true
			var watcher = new Watcher(vm, expOrFn, cb, options)
			if (options.immediate) {
				cb.call(vm, watcher.value)
			}
			return function unwatchFn() {
				watcher.teardown()
			}
		}
	}

	/*  */

	function initProvide(vm) {
		var provide = vm.$options.provide
		if (provide) {
			vm._provided = typeof provide === 'function' ? provide.call(vm) : provide
		}
	}

	function initInjections(vm) {
		var result = resolveInject(vm.$options.inject, vm)
		if (result) {
			toggleObserving(false)
			Object.keys(result).forEach(function (key) {
				/* istanbul ignore else */
				{
					defineReactive(vm, key, result[key], function () {
						warn(
							'Avoid mutating an injected value directly since the changes will be ' +
								'overwritten whenever the provided component re-renders. ' +
								'injection being mutated: "' +
								key +
								'"',
							vm
						)
					})
				}
			})
			toggleObserving(true)
		}
	}

	function resolveInject(inject, vm) {
		if (inject) {
			// inject is :any because flow is not smart enough to figure out cached
			var result = Object.create(null)
			var keys = hasSymbol
				? Reflect.ownKeys(inject).filter(function (key) {
						/* istanbul ignore next */
						return Object.getOwnPropertyDescriptor(inject, key).enumerable
				  })
				: Object.keys(inject)

			for (var i = 0; i < keys.length; i++) {
				var key = keys[i]
				var provideKey = inject[key].from
				var source = vm
				while (source) {
					if (source._provided && hasOwn(source._provided, provideKey)) {
						result[key] = source._provided[provideKey]
						break
					}
					source = source.$parent
				}
				if (!source) {
					if ('default' in inject[key]) {
						var provideDefault = inject[key].default
						result[key] = typeof provideDefault === 'function' ? provideDefault.call(vm) : provideDefault
					} else {
						warn('Injection "' + key + '" not found', vm)
					}
				}
			}
			return result
		}
	}

	/*  */

	/**
	 * Runtime helper for rendering v-for lists.
	 */
	function renderList(val, render) {
		var ret, i, l, keys, key
		if (Array.isArray(val) || typeof val === 'string') {
			ret = new Array(val.length)
			for (i = 0, l = val.length; i < l; i++) {
				ret[i] = render(val[i], i)
			}
		} else if (typeof val === 'number') {
			ret = new Array(val)
			for (i = 0; i < val; i++) {
				ret[i] = render(i + 1, i)
			}
		} else if (isObject(val)) {
			keys = Object.keys(val)
			ret = new Array(keys.length)
			for (i = 0, l = keys.length; i < l; i++) {
				key = keys[i]
				ret[i] = render(val[key], key, i)
			}
		}
		if (isDef(ret)) {
			ret._isVList = true
		}
		return ret
	}

	/*  */

	/**
	 * Runtime helper for rendering <slot>
	 */
	function renderSlot(name, fallback, props, bindObject) {
		var scopedSlotFn = this.$scopedSlots[name]
		var nodes
		if (scopedSlotFn) {
			// scoped slot
			props = props || {}
			if (bindObject) {
				if ('development' !== 'production' && !isObject(bindObject)) {
					warn('slot v-bind without argument expects an Object', this)
				}
				props = extend(extend({}, bindObject), props)
			}
			nodes = scopedSlotFn(props) || fallback
		} else {
			var slotNodes = this.$slots[name]
			// warn duplicate slot usage
			if (slotNodes) {
				if ('development' !== 'production' && slotNodes._rendered) {
					warn('Duplicate presence of slot "' + name + '" found in the same render tree ' + '- this will likely cause render errors.', this)
				}
				slotNodes._rendered = true
			}
			nodes = slotNodes || fallback
		}

		var target = props && props.slot
		if (target) {
			return this.$createElement('template', { slot: target }, nodes)
		} else {
			return nodes
		}
	}

	/*  */

	/**
	 * Runtime helper for resolving filters
	 */
	function resolveFilter(id) {
		return resolveAsset(this.$options, 'filters', id, true) || identity
	}

	/*  */

	function isKeyNotMatch(expect, actual) {
		if (Array.isArray(expect)) {
			return expect.indexOf(actual) === -1
		} else {
			return expect !== actual
		}
	}

	/**
	 * Runtime helper for checking keyCodes from config.
	 * exposed as Vue.prototype._k
	 * passing in eventKeyName as last argument separately for backwards compat
	 */
	function checkKeyCodes(eventKeyCode, key, builtInKeyCode, eventKeyName, builtInKeyName) {
		var mappedKeyCode = config.keyCodes[key] || builtInKeyCode
		if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
			return isKeyNotMatch(builtInKeyName, eventKeyName)
		} else if (mappedKeyCode) {
			return isKeyNotMatch(mappedKeyCode, eventKeyCode)
		} else if (eventKeyName) {
			return hyphenate(eventKeyName) !== key
		}
	}

	/*  */

	/**
	 * Runtime helper for merging v-bind="object" into a VNode's data.
	 */
	function bindObjectProps(data, tag, value, asProp, isSync) {
		if (value) {
			if (!isObject(value)) {
				'development' !== 'production' && warn('v-bind without argument expects an Object or Array value', this)
			} else {
				if (Array.isArray(value)) {
					value = toObject(value)
				}
				var hash
				var loop = function (key) {
					if (key === 'class' || key === 'style' || isReservedAttribute(key)) {
						hash = data
					} else {
						var type = data.attrs && data.attrs.type
						hash = asProp || config.mustUseProp(tag, type, key) ? data.domProps || (data.domProps = {}) : data.attrs || (data.attrs = {})
					}
					if (!(key in hash)) {
						hash[key] = value[key]

						if (isSync) {
							var on = data.on || (data.on = {})
							on['update:' + key] = function ($event) {
								value[key] = $event
							}
						}
					}
				}

				for (var key in value) loop(key)
			}
		}
		return data
	}

	/*  */

	/**
	 * Runtime helper for rendering static trees.
	 */
	function renderStatic(index, isInFor) {
		var cached = this._staticTrees || (this._staticTrees = [])
		var tree = cached[index]
		// if has already-rendered static tree and not inside v-for,
		// we can reuse the same tree.
		if (tree && !isInFor) {
			return tree
		}
		// otherwise, render a fresh tree.
		tree = cached[index] = this.$options.staticRenderFns[index].call(
			this._renderProxy,
			null,
			this // for render fns generated for functional component templates
		)
		markStatic(tree, '__static__' + index, false)
		return tree
	}

	/**
	 * Runtime helper for v-once.
	 * Effectively it means marking the node as static with a unique key.
	 */
	function markOnce(tree, index, key) {
		markStatic(tree, '__once__' + index + (key ? '_' + key : ''), true)
		return tree
	}

	function markStatic(tree, key, isOnce) {
		if (Array.isArray(tree)) {
			for (var i = 0; i < tree.length; i++) {
				if (tree[i] && typeof tree[i] !== 'string') {
					markStaticNode(tree[i], key + '_' + i, isOnce)
				}
			}
		} else {
			markStaticNode(tree, key, isOnce)
		}
	}

	function markStaticNode(node, key, isOnce) {
		node.isStatic = true
		node.key = key
		node.isOnce = isOnce
	}

	/*  */

	function bindObjectListeners(data, value) {
		if (value) {
			if (!isPlainObject(value)) {
				'development' !== 'production' && warn('v-on without argument expects an Object value', this)
			} else {
				var on = (data.on = data.on ? extend({}, data.on) : {})
				for (var key in value) {
					var existing = on[key]
					var ours = value[key]
					on[key] = existing ? [].concat(existing, ours) : ours
				}
			}
		}
		return data
	}

	/*  */

	function installRenderHelpers(target) {
		target._o = markOnce
		target._n = toNumber
		target._s = toString
		target._l = renderList
		target._t = renderSlot
		target._q = looseEqual
		target._i = looseIndexOf
		target._m = renderStatic
		target._f = resolveFilter
		target._k = checkKeyCodes
		target._b = bindObjectProps
		target._v = createTextVNode
		target._e = createEmptyVNode
		target._u = resolveScopedSlots
		target._g = bindObjectListeners
	}

	/*  */

	function FunctionalRenderContext(data, props, children, parent, Ctor) {
		var options = Ctor.options
		// ensure the createElement function in functional components
		// gets a unique context - this is necessary for correct named slot check
		var contextVm
		if (hasOwn(parent, '_uid')) {
			contextVm = Object.create(parent)
			// $flow-disable-line
			contextVm._original = parent
		} else {
			// the context vm passed in is a functional context as well.
			// in this case we want to make sure we are able to get a hold to the
			// real context instance.
			contextVm = parent
			// $flow-disable-line
			parent = parent._original
		}
		var isCompiled = isTrue(options._compiled)
		var needNormalization = !isCompiled

		this.data = data
		this.props = props
		this.children = children
		this.parent = parent
		this.listeners = data.on || emptyObject
		this.injections = resolveInject(options.inject, parent)
		this.slots = function () {
			return resolveSlots(children, parent)
		}

		// support for compiled functional template
		if (isCompiled) {
			// exposing $options for renderStatic()
			this.$options = options
			// pre-resolve slots for renderSlot()
			this.$slots = this.slots()
			this.$scopedSlots = data.scopedSlots || emptyObject
		}

		if (options._scopeId) {
			this._c = function (a, b, c, d) {
				var vnode = createElement(contextVm, a, b, c, d, needNormalization)
				if (vnode && !Array.isArray(vnode)) {
					vnode.fnScopeId = options._scopeId
					vnode.fnContext = parent
				}
				return vnode
			}
		} else {
			this._c = function (a, b, c, d) {
				return createElement(contextVm, a, b, c, d, needNormalization)
			}
		}
	}

	installRenderHelpers(FunctionalRenderContext.prototype)

	function createFunctionalComponent(Ctor, propsData, data, contextVm, children) {
		var options = Ctor.options
		var props = {}
		var propOptions = options.props
		if (isDef(propOptions)) {
			for (var key in propOptions) {
				props[key] = validateProp(key, propOptions, propsData || emptyObject)
			}
		} else {
			if (isDef(data.attrs)) {
				mergeProps(props, data.attrs)
			}
			if (isDef(data.props)) {
				mergeProps(props, data.props)
			}
		}

		var renderContext = new FunctionalRenderContext(data, props, children, contextVm, Ctor)

		var vnode = options.render.call(null, renderContext._c, renderContext)

		if (vnode instanceof VNode) {
			return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options)
		} else if (Array.isArray(vnode)) {
			var vnodes = normalizeChildren(vnode) || []
			var res = new Array(vnodes.length)
			for (var i = 0; i < vnodes.length; i++) {
				res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options)
			}
			return res
		}
	}

	function cloneAndMarkFunctionalResult(vnode, data, contextVm, options) {
		// #7817 clone node before setting fnContext, otherwise if the node is reused
		// (e.g. it was from a cached normal slot) the fnContext causes named slots
		// that should not be matched to match.
		var clone = cloneVNode(vnode)
		clone.fnContext = contextVm
		clone.fnOptions = options
		if (data.slot) {
			;(clone.data || (clone.data = {})).slot = data.slot
		}
		return clone
	}

	function mergeProps(to, from) {
		for (var key in from) {
			to[camelize(key)] = from[key]
		}
	}

	/*  */

	// Register the component hook to weex native render engine.
	// The hook will be triggered by native, not javascript.

	// Updates the state of the component to weex native render engine.

	/*  */

	// https://github.com/Hanks10100/weex-native-directive/tree/master/component

	// listening on native callback

	/*  */

	/*  */

	// inline hooks to be invoked on component VNodes during patch
	var componentVNodeHooks = {
		init: function init(vnode, hydrating, parentElm, refElm) {
			if (vnode.componentInstance && !vnode.componentInstance._isDestroyed && vnode.data.keepAlive) {
				// kept-alive components, treat as a patch
				var mountedNode = vnode // work around flow
				componentVNodeHooks.prepatch(mountedNode, mountedNode)
			} else {
				var child = (vnode.componentInstance = createComponentInstanceForVnode(vnode, activeInstance, parentElm, refElm))
				child.$mount(hydrating ? vnode.elm : undefined, hydrating)
			}
		},

		prepatch: function prepatch(oldVnode, vnode) {
			var options = vnode.componentOptions
			var child = (vnode.componentInstance = oldVnode.componentInstance)
			updateChildComponent(
				child,
				options.propsData, // updated props
				options.listeners, // updated listeners
				vnode, // new parent vnode
				options.children // new children
			)
		},

		insert: function insert(vnode) {
			var context = vnode.context
			var componentInstance = vnode.componentInstance
			if (!componentInstance._isMounted) {
				componentInstance._isMounted = true
				callHook(componentInstance, 'mounted')
			}
			if (vnode.data.keepAlive) {
				if (context._isMounted) {
					// vue-router#1212
					// During updates, a kept-alive component's child components may
					// change, so directly walking the tree here may call activated hooks
					// on incorrect children. Instead we push them into a queue which will
					// be processed after the whole patch process ended.
					queueActivatedComponent(componentInstance)
				} else {
					activateChildComponent(componentInstance, true /* direct */)
				}
			}
		},

		destroy: function destroy(vnode) {
			var componentInstance = vnode.componentInstance
			if (!componentInstance._isDestroyed) {
				if (!vnode.data.keepAlive) {
					componentInstance.$destroy()
				} else {
					deactivateChildComponent(componentInstance, true /* direct */)
				}
			}
		},
	}

	var hooksToMerge = Object.keys(componentVNodeHooks)

	function createComponent(Ctor, data, context, children, tag) {
		if (isUndef(Ctor)) {
			return
		}

		var baseCtor = context.$options._base

		// plain options object: turn it into a constructor
		if (isObject(Ctor)) {
			Ctor = baseCtor.extend(Ctor)
		}

		// if at this stage it's not a constructor or an async component factory,
		// reject.
		if (typeof Ctor !== 'function') {
			{
				warn('Invalid Component definition: ' + String(Ctor), context)
			}
			return
		}

		// async component
		var asyncFactory
		if (isUndef(Ctor.cid)) {
			asyncFactory = Ctor
			Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context)
			if (Ctor === undefined) {
				// return a placeholder node for async component, which is rendered
				// as a comment node but preserves all the raw information for the node.
				// the information will be used for async server-rendering and hydration.
				return createAsyncPlaceholder(asyncFactory, data, context, children, tag)
			}
		}

		data = data || {}

		// resolve constructor options in case global mixins are applied after
		// component constructor creation
		resolveConstructorOptions(Ctor)

		// transform component v-model data into props & events
		if (isDef(data.model)) {
			transformModel(Ctor.options, data)
		}

		// extract props
		var propsData = extractPropsFromVNodeData(data, Ctor, tag)

		// functional component
		if (isTrue(Ctor.options.functional)) {
			return createFunctionalComponent(Ctor, propsData, data, context, children)
		}

		// extract listeners, since these needs to be treated as
		// child component listeners instead of DOM listeners
		var listeners = data.on
		// replace with listeners with .native modifier
		// so it gets processed during parent component patch.
		data.on = data.nativeOn

		if (isTrue(Ctor.options.abstract)) {
			// abstract components do not keep anything
			// other than props & listeners & slot

			// work around flow
			var slot = data.slot
			data = {}
			if (slot) {
				data.slot = slot
			}
		}

		// install component management hooks onto the placeholder node
		installComponentHooks(data)

		// return a placeholder vnode
		var name = Ctor.options.name || tag
		var vnode = new VNode(
			'vue-component-' + Ctor.cid + (name ? '-' + name : ''),
			data,
			undefined,
			undefined,
			undefined,
			context,
			{ Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
			asyncFactory
		)

		// Weex specific: invoke recycle-list optimized @render function for
		// extracting cell-slot template.
		// https://github.com/Hanks10100/weex-native-directive/tree/master/component
		/* istanbul ignore if */
		return vnode
	}

	function createComponentInstanceForVnode(
		vnode, // we know it's MountedComponentVNode but flow doesn't
		parent, // activeInstance in lifecycle state
		parentElm,
		refElm
	) {
		var options = {
			_isComponent: true,
			parent: parent,
			_parentVnode: vnode,
			_parentElm: parentElm || null,
			_refElm: refElm || null,
		}
		// check inline-template render functions
		var inlineTemplate = vnode.data.inlineTemplate
		if (isDef(inlineTemplate)) {
			options.render = inlineTemplate.render
			options.staticRenderFns = inlineTemplate.staticRenderFns
		}
		return new vnode.componentOptions.Ctor(options)
	}

	function installComponentHooks(data) {
		var hooks = data.hook || (data.hook = {})
		for (var i = 0; i < hooksToMerge.length; i++) {
			var key = hooksToMerge[i]
			hooks[key] = componentVNodeHooks[key]
		}
	}

	// transform component v-model info (value and callback) into
	// prop and event handler respectively.
	function transformModel(options, data) {
		var prop = (options.model && options.model.prop) || 'value'
		var event = (options.model && options.model.event) || 'input'
		;(data.props || (data.props = {}))[prop] = data.model.value
		var on = data.on || (data.on = {})
		if (isDef(on[event])) {
			on[event] = [data.model.callback].concat(on[event])
		} else {
			on[event] = data.model.callback
		}
	}

	/*  */

	var SIMPLE_NORMALIZE = 1
	var ALWAYS_NORMALIZE = 2

	// wrapper function for providing a more flexible interface
	// without getting yelled at by flow
	function createElement(context, tag, data, children, normalizationType, alwaysNormalize) {
		if (Array.isArray(data) || isPrimitive(data)) {
			normalizationType = children
			children = data
			data = undefined
		}
		if (isTrue(alwaysNormalize)) {
			normalizationType = ALWAYS_NORMALIZE
		}
		return _createElement(context, tag, data, children, normalizationType)
	}

	function _createElement(context, tag, data, children, normalizationType) {
		if (isDef(data) && isDef(data.__ob__)) {
			'development' !== 'production' &&
				warn(
					'Avoid using observed data object as vnode data: ' + JSON.stringify(data) + '\n' + 'Always create fresh vnode data objects in each render!',
					context
				)
			return createEmptyVNode()
		}
		// object syntax in v-bind
		if (isDef(data) && isDef(data.is)) {
			tag = data.is
		}
		if (!tag) {
			// in case of component :is set to falsy value
			return createEmptyVNode()
		}
		// warn against non-primitive key
		if ('development' !== 'production' && isDef(data) && isDef(data.key) && !isPrimitive(data.key)) {
			{
				warn('Avoid using non-primitive value as key, ' + 'use string/number value instead.', context)
			}
		}
		// support single function children as default scoped slot
		if (Array.isArray(children) && typeof children[0] === 'function') {
			data = data || {}
			data.scopedSlots = { default: children[0] }
			children.length = 0
		}
		if (normalizationType === ALWAYS_NORMALIZE) {
			children = normalizeChildren(children)
		} else if (normalizationType === SIMPLE_NORMALIZE) {
			children = simpleNormalizeChildren(children)
		}
		var vnode, ns
		if (typeof tag === 'string') {
			var Ctor
			ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag)
			if (config.isReservedTag(tag)) {
				// platform built-in elements
				vnode = new VNode(config.parsePlatformTagName(tag), data, children, undefined, undefined, context)
			} else if (isDef((Ctor = resolveAsset(context.$options, 'components', tag)))) {
				// component
				vnode = createComponent(Ctor, data, context, children, tag)
			} else {
				// unknown or unlisted namespaced elements
				// check at runtime because it may get assigned a namespace when its
				// parent normalizes children
				vnode = new VNode(tag, data, children, undefined, undefined, context)
			}
		} else {
			// direct component options / constructor
			vnode = createComponent(tag, data, context, children)
		}
		if (Array.isArray(vnode)) {
			return vnode
		} else if (isDef(vnode)) {
			if (isDef(ns)) {
				applyNS(vnode, ns)
			}
			if (isDef(data)) {
				registerDeepBindings(data)
			}
			return vnode
		} else {
			return createEmptyVNode()
		}
	}

	function applyNS(vnode, ns, force) {
		vnode.ns = ns
		if (vnode.tag === 'foreignObject') {
			// use default namespace inside foreignObject
			ns = undefined
			force = true
		}
		if (isDef(vnode.children)) {
			for (var i = 0, l = vnode.children.length; i < l; i++) {
				var child = vnode.children[i]
				if (isDef(child.tag) && (isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
					applyNS(child, ns, force)
				}
			}
		}
	}

	// ref #5318
	// necessary to ensure parent re-render when deep bindings like :style and
	// :class are used on slot nodes
	function registerDeepBindings(data) {
		if (isObject(data.style)) {
			traverse(data.style)
		}
		if (isObject(data.class)) {
			traverse(data.class)
		}
	}

	/*  */

	function initRender(vm) {
		vm._vnode = null // the root of the child tree
		vm._staticTrees = null // v-once cached trees
		var options = vm.$options
		var parentVnode = (vm.$vnode = options._parentVnode) // the placeholder node in parent tree
		var renderContext = parentVnode && parentVnode.context
		vm.$slots = resolveSlots(options._renderChildren, renderContext)
		vm.$scopedSlots = emptyObject
		// bind the createElement fn to this instance
		// so that we get proper render context inside it.
		// args order: tag, data, children, normalizationType, alwaysNormalize
		// internal version is used by render functions compiled from templates
		vm._c = function (a, b, c, d) {
			return createElement(vm, a, b, c, d, false)
		}
		// normalization is always applied for the public version, used in
		// user-written render functions.
		vm.$createElement = function (a, b, c, d) {
			return createElement(vm, a, b, c, d, true)
		}

		// $attrs & $listeners are exposed for easier HOC creation.
		// they need to be reactive so that HOCs using them are always updated
		var parentData = parentVnode && parentVnode.data

		/* istanbul ignore else */
		{
			defineReactive(
				vm,
				'$attrs',
				(parentData && parentData.attrs) || emptyObject,
				function () {
					!isUpdatingChildComponent && warn('$attrs is readonly.', vm)
				},
				true
			)
			defineReactive(
				vm,
				'$listeners',
				options._parentListeners || emptyObject,
				function () {
					!isUpdatingChildComponent && warn('$listeners is readonly.', vm)
				},
				true
			)
		}
	}

	function renderMixin(Vue) {
		// install runtime convenience helpers
		installRenderHelpers(Vue.prototype)

		Vue.prototype.$nextTick = function (fn) {
			return nextTick(fn, this)
		}

		Vue.prototype._render = function () {
			var vm = this
			var ref = vm.$options
			var render = ref.render
			var _parentVnode = ref._parentVnode

			// reset _rendered flag on slots for duplicate slot check
			{
				for (var key in vm.$slots) {
					// $flow-disable-line
					vm.$slots[key]._rendered = false
				}
			}

			if (_parentVnode) {
				vm.$scopedSlots = _parentVnode.data.scopedSlots || emptyObject
			}

			// set parent vnode. this allows render functions to have access
			// to the data on the placeholder node.
			vm.$vnode = _parentVnode
			// render self
			var vnode
			try {
				vnode = render.call(vm._renderProxy, vm.$createElement)
			} catch (e) {
				handleError(e, vm, 'render')
				// return error render result,
				// or previous vnode to prevent render error causing blank component
				/* istanbul ignore else */
				{
					if (vm.$options.renderError) {
						try {
							vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e)
						} catch (e) {
							handleError(e, vm, 'renderError')
							vnode = vm._vnode
						}
					} else {
						vnode = vm._vnode
					}
				}
			}
			// return empty vnode in case the render function errored out
			if (!(vnode instanceof VNode)) {
				if ('development' !== 'production' && Array.isArray(vnode)) {
					warn('Multiple root nodes returned from render function. Render function ' + 'should return a single root node.', vm)
				}
				vnode = createEmptyVNode()
			}
			// set parent
			vnode.parent = _parentVnode
			return vnode
		}
	}

	/*  */

	var uid$3 = 0

	function initMixin(Vue) {
		Vue.prototype._init = function (options) {
			var vm = this
			// a uid
			vm._uid = uid$3++

			var startTag, endTag
			/* istanbul ignore if */
			if ('development' !== 'production' && config.performance && mark) {
				startTag = 'vue-perf-start:' + vm._uid
				endTag = 'vue-perf-end:' + vm._uid
				mark(startTag)
			}

			// a flag to avoid this being observed
			vm._isVue = true
			// merge options
			if (options && options._isComponent) {
				// optimize internal component instantiation
				// since dynamic options merging is pretty slow, and none of the
				// internal component options needs special treatment.
				initInternalComponent(vm, options)
			} else {
				vm.$options = mergeOptions(resolveConstructorOptions(vm.constructor), options || {}, vm)
			}
			/* istanbul ignore else */
			{
				initProxy(vm)
			}
			// expose real self
			vm._self = vm
			initLifecycle(vm)
			initEvents(vm)
			initRender(vm)
			callHook(vm, 'beforeCreate')
			initInjections(vm) // resolve injections before data/props
			initState(vm)
			initProvide(vm) // resolve provide after data/props
			callHook(vm, 'created')

			/* istanbul ignore if */
			if ('development' !== 'production' && config.performance && mark) {
				vm._name = formatComponentName(vm, false)
				mark(endTag)
				measure('vue ' + vm._name + ' init', startTag, endTag)
			}

			if (vm.$options.el) {
				vm.$mount(vm.$options.el)
			}
		}
	}

	function initInternalComponent(vm, options) {
		var opts = (vm.$options = Object.create(vm.constructor.options))
		// doing this because it's faster than dynamic enumeration.
		var parentVnode = options._parentVnode
		opts.parent = options.parent
		opts._parentVnode = parentVnode
		opts._parentElm = options._parentElm
		opts._refElm = options._refElm

		var vnodeComponentOptions = parentVnode.componentOptions
		opts.propsData = vnodeComponentOptions.propsData
		opts._parentListeners = vnodeComponentOptions.listeners
		opts._renderChildren = vnodeComponentOptions.children
		opts._componentTag = vnodeComponentOptions.tag

		if (options.render) {
			opts.render = options.render
			opts.staticRenderFns = options.staticRenderFns
		}
	}

	function resolveConstructorOptions(Ctor) {
		var options = Ctor.options
		if (Ctor.super) {
			var superOptions = resolveConstructorOptions(Ctor.super)
			var cachedSuperOptions = Ctor.superOptions
			if (superOptions !== cachedSuperOptions) {
				// super option changed,
				// need to resolve new options.
				Ctor.superOptions = superOptions
				// check if there are any late-modified/attached options (#4976)
				var modifiedOptions = resolveModifiedOptions(Ctor)
				// update base extend options
				if (modifiedOptions) {
					extend(Ctor.extendOptions, modifiedOptions)
				}
				options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions)
				if (options.name) {
					options.components[options.name] = Ctor
				}
			}
		}
		return options
	}

	function resolveModifiedOptions(Ctor) {
		var modified
		var latest = Ctor.options
		var extended = Ctor.extendOptions
		var sealed = Ctor.sealedOptions
		for (var key in latest) {
			if (latest[key] !== sealed[key]) {
				if (!modified) {
					modified = {}
				}
				modified[key] = dedupe(latest[key], extended[key], sealed[key])
			}
		}
		return modified
	}

	function dedupe(latest, extended, sealed) {
		// compare latest and sealed to ensure lifecycle hooks won't be duplicated
		// between merges
		if (Array.isArray(latest)) {
			var res = []
			sealed = Array.isArray(sealed) ? sealed : [sealed]
			extended = Array.isArray(extended) ? extended : [extended]
			for (var i = 0; i < latest.length; i++) {
				// push original options and not sealed options to exclude duplicated options
				if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
					res.push(latest[i])
				}
			}
			return res
		} else {
			return latest
		}
	}

	function Vue(options) {
		if ('development' !== 'production' && !(this instanceof Vue)) {
			warn('Vue is a constructor and should be called with the `new` keyword')
		}
		this._init(options)
	}

	initMixin(Vue)
	stateMixin(Vue)
	eventsMixin(Vue)
	lifecycleMixin(Vue)
	renderMixin(Vue)

	/*  */

	function initUse(Vue) {
		Vue.use = function (plugin) {
			var installedPlugins = this._installedPlugins || (this._installedPlugins = [])
			if (installedPlugins.indexOf(plugin) > -1) {
				return this
			}

			// additional parameters
			var args = toArray(arguments, 1)
			args.unshift(this)
			if (typeof plugin.install === 'function') {
				plugin.install.apply(plugin, args)
			} else if (typeof plugin === 'function') {
				plugin.apply(null, args)
			}
			installedPlugins.push(plugin)
			return this
		}
	}

	/*  */

	function initMixin$1(Vue) {
		Vue.mixin = function (mixin) {
			this.options = mergeOptions(this.options, mixin)
			return this
		}
	}

	/*  */

	function initExtend(Vue) {
		/**
		 * Each instance constructor, including Vue, has a unique
		 * cid. This enables us to create wrapped "child
		 * constructors" for prototypal inheritance and cache them.
		 */
		Vue.cid = 0
		var cid = 1

		/**
		 * Class inheritance
		 */
		Vue.extend = function (extendOptions) {
			extendOptions = extendOptions || {}
			var Super = this
			var SuperId = Super.cid
			var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {})
			if (cachedCtors[SuperId]) {
				return cachedCtors[SuperId]
			}

			var name = extendOptions.name || Super.options.name
			if ('development' !== 'production' && name) {
				validateComponentName(name)
			}

			var Sub = function VueComponent(options) {
				this._init(options)
			}
			Sub.prototype = Object.create(Super.prototype)
			Sub.prototype.constructor = Sub
			Sub.cid = cid++
			Sub.options = mergeOptions(Super.options, extendOptions)
			Sub['super'] = Super

			// For props and computed properties, we define the proxy getters on
			// the Vue instances at extension time, on the extended prototype. This
			// avoids Object.defineProperty calls for each instance created.
			if (Sub.options.props) {
				initProps$1(Sub)
			}
			if (Sub.options.computed) {
				initComputed$1(Sub)
			}

			// allow further extension/mixin/plugin usage
			Sub.extend = Super.extend
			Sub.mixin = Super.mixin
			Sub.use = Super.use

			// create asset registers, so extended classes
			// can have their private assets too.
			ASSET_TYPES.forEach(function (type) {
				Sub[type] = Super[type]
			})
			// enable recursive self-lookup
			if (name) {
				Sub.options.components[name] = Sub
			}

			// keep a reference to the super options at extension time.
			// later at instantiation we can check if Super's options have
			// been updated.
			Sub.superOptions = Super.options
			Sub.extendOptions = extendOptions
			Sub.sealedOptions = extend({}, Sub.options)

			// cache constructor
			cachedCtors[SuperId] = Sub
			return Sub
		}
	}

	function initProps$1(Comp) {
		var props = Comp.options.props
		for (var key in props) {
			proxy(Comp.prototype, '_props', key)
		}
	}

	function initComputed$1(Comp) {
		var computed = Comp.options.computed
		for (var key in computed) {
			defineComputed(Comp.prototype, key, computed[key])
		}
	}

	/*  */

	function initAssetRegisters(Vue) {
		/**
		 * Create asset registration methods.
		 */
		ASSET_TYPES.forEach(function (type) {
			Vue[type] = function (id, definition) {
				if (!definition) {
					return this.options[type + 's'][id]
				} else {
					/* istanbul ignore if */
					if ('development' !== 'production' && type === 'component') {
						validateComponentName(id)
					}
					if (type === 'component' && isPlainObject(definition)) {
						definition.name = definition.name || id
						definition = this.options._base.extend(definition)
					}
					if (type === 'directive' && typeof definition === 'function') {
						definition = { bind: definition, update: definition }
					}
					this.options[type + 's'][id] = definition
					return definition
				}
			}
		})
	}

	/*  */

	function getComponentName(opts) {
		return opts && (opts.Ctor.options.name || opts.tag)
	}

	function matches(pattern, name) {
		if (Array.isArray(pattern)) {
			return pattern.indexOf(name) > -1
		} else if (typeof pattern === 'string') {
			return pattern.split(',').indexOf(name) > -1
		} else if (isRegExp(pattern)) {
			return pattern.test(name)
		}
		/* istanbul ignore next */
		return false
	}

	function pruneCache(keepAliveInstance, filter) {
		var cache = keepAliveInstance.cache
		var keys = keepAliveInstance.keys
		var _vnode = keepAliveInstance._vnode
		for (var key in cache) {
			var cachedNode = cache[key]
			if (cachedNode) {
				var name = getComponentName(cachedNode.componentOptions)
				if (name && !filter(name)) {
					pruneCacheEntry(cache, key, keys, _vnode)
				}
			}
		}
	}

	function pruneCacheEntry(cache, key, keys, current) {
		var cached$$1 = cache[key]
		if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
			cached$$1.componentInstance.$destroy()
		}
		cache[key] = null
		remove(keys, key)
	}

	var patternTypes = [String, RegExp, Array]

	var KeepAlive = {
		name: 'keep-alive',
		abstract: true,

		props: {
			include: patternTypes,
			exclude: patternTypes,
			max: [String, Number],
		},

		created: function created() {
			this.cache = Object.create(null)
			this.keys = []
		},

		destroyed: function destroyed() {
			var this$1 = this

			for (var key in this$1.cache) {
				pruneCacheEntry(this$1.cache, key, this$1.keys)
			}
		},

		mounted: function mounted() {
			var this$1 = this

			this.$watch('include', function (val) {
				pruneCache(this$1, function (name) {
					return matches(val, name)
				})
			})
			this.$watch('exclude', function (val) {
				pruneCache(this$1, function (name) {
					return !matches(val, name)
				})
			})
		},

		render: function render() {
			var slot = this.$slots.default
			var vnode = getFirstComponentChild(slot)
			var componentOptions = vnode && vnode.componentOptions
			if (componentOptions) {
				// check pattern
				var name = getComponentName(componentOptions)
				var ref = this
				var include = ref.include
				var exclude = ref.exclude
				if (
					// not included
					(include && (!name || !matches(include, name))) ||
					// excluded
					(exclude && name && matches(exclude, name))
				) {
					return vnode
				}

				var ref$1 = this
				var cache = ref$1.cache
				var keys = ref$1.keys
				var key =
					vnode.key == null
						? // same constructor may get registered as different local components
						  // so cid alone is not enough (#3269)
						  componentOptions.Ctor.cid + (componentOptions.tag ? '::' + componentOptions.tag : '')
						: vnode.key
				if (cache[key]) {
					vnode.componentInstance = cache[key].componentInstance
					// make current key freshest
					remove(keys, key)
					keys.push(key)
				} else {
					cache[key] = vnode
					keys.push(key)
					// prune oldest entry
					if (this.max && keys.length > parseInt(this.max)) {
						pruneCacheEntry(cache, keys[0], keys, this._vnode)
					}
				}

				vnode.data.keepAlive = true
			}
			return vnode || (slot && slot[0])
		},
	}

	var builtInComponents = {
		KeepAlive: KeepAlive,
	}

	/*  */

	function initGlobalAPI(Vue) {
		// config
		var configDef = {}
		configDef.get = function () {
			return config
		}
		{
			configDef.set = function () {
				warn('Do not replace the Vue.config object, set individual fields instead.')
			}
		}
		Object.defineProperty(Vue, 'config', configDef)

		// exposed util methods.
		// NOTE: these are not considered part of the public API - avoid relying on
		// them unless you are aware of the risk.
		Vue.util = {
			warn: warn,
			extend: extend,
			mergeOptions: mergeOptions,
			defineReactive: defineReactive,
		}

		Vue.set = set
		Vue.delete = del
		Vue.nextTick = nextTick

		Vue.options = Object.create(null)
		ASSET_TYPES.forEach(function (type) {
			Vue.options[type + 's'] = Object.create(null)
		})

		// this is used to identify the "base" constructor to extend all plain-object
		// components with in Weex's multi-instance scenarios.
		Vue.options._base = Vue

		extend(Vue.options.components, builtInComponents)

		initUse(Vue)
		initMixin$1(Vue)
		initExtend(Vue)
		initAssetRegisters(Vue)
	}

	initGlobalAPI(Vue)

	Object.defineProperty(Vue.prototype, '$isServer', {
		get: isServerRendering,
	})

	Object.defineProperty(Vue.prototype, '$ssrContext', {
		get: function get() {
			/* istanbul ignore next */
			return this.$vnode && this.$vnode.ssrContext
		},
	})

	// expose FunctionalRenderContext for ssr runtime helper installation
	Object.defineProperty(Vue, 'FunctionalRenderContext', {
		value: FunctionalRenderContext,
	})

	Vue.version = '2.5.16'

	/*  */

	// these are reserved for web because they are directly compiled away
	// during template compilation
	var isReservedAttr = makeMap('style,class')

	// attributes that should be using props for binding
	var acceptValue = makeMap('input,textarea,option,select,progress')
	var mustUseProp = function (tag, type, attr) {
		return (
			(attr === 'value' && acceptValue(tag) && type !== 'button') ||
			(attr === 'selected' && tag === 'option') ||
			(attr === 'checked' && tag === 'input') ||
			(attr === 'muted' && tag === 'video')
		)
	}

	var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck')

	var isBooleanAttr = makeMap(
		'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
			'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
			'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
			'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
			'required,reversed,scoped,seamless,selected,sortable,translate,' +
			'truespeed,typemustmatch,visible'
	)

	var xlinkNS = 'http://www.w3.org/1999/xlink'

	var isXlink = function (name) {
		return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
	}

	var getXlinkProp = function (name) {
		return isXlink(name) ? name.slice(6, name.length) : ''
	}

	var isFalsyAttrValue = function (val) {
		return val == null || val === false
	}

	/*  */

	function genClassForVnode(vnode) {
		var data = vnode.data
		var parentNode = vnode
		var childNode = vnode
		while (isDef(childNode.componentInstance)) {
			childNode = childNode.componentInstance._vnode
			if (childNode && childNode.data) {
				data = mergeClassData(childNode.data, data)
			}
		}
		while (isDef((parentNode = parentNode.parent))) {
			if (parentNode && parentNode.data) {
				data = mergeClassData(data, parentNode.data)
			}
		}
		return renderClass(data.staticClass, data.class)
	}

	function mergeClassData(child, parent) {
		return {
			staticClass: concat(child.staticClass, parent.staticClass),
			class: isDef(child.class) ? [child.class, parent.class] : parent.class,
		}
	}

	function renderClass(staticClass, dynamicClass) {
		if (isDef(staticClass) || isDef(dynamicClass)) {
			return concat(staticClass, stringifyClass(dynamicClass))
		}
		/* istanbul ignore next */
		return ''
	}

	function concat(a, b) {
		return a ? (b ? a + ' ' + b : a) : b || ''
	}

	function stringifyClass(value) {
		if (Array.isArray(value)) {
			return stringifyArray(value)
		}
		if (isObject(value)) {
			return stringifyObject(value)
		}
		if (typeof value === 'string') {
			return value
		}
		/* istanbul ignore next */
		return ''
	}

	function stringifyArray(value) {
		var res = ''
		var stringified
		for (var i = 0, l = value.length; i < l; i++) {
			if (isDef((stringified = stringifyClass(value[i]))) && stringified !== '') {
				if (res) {
					res += ' '
				}
				res += stringified
			}
		}
		return res
	}

	function stringifyObject(value) {
		var res = ''
		for (var key in value) {
			if (value[key]) {
				if (res) {
					res += ' '
				}
				res += key
			}
		}
		return res
	}

	/*  */

	var namespaceMap = {
		svg: 'http://www.w3.org/2000/svg',
		math: 'http://www.w3.org/1998/Math/MathML',
	}

	var isHTMLTag = makeMap(
		'html,body,base,head,link,meta,style,title,' +
			'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
			'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
			'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
			's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
			'embed,object,param,source,canvas,script,noscript,del,ins,' +
			'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
			'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
			'output,progress,select,textarea,' +
			'details,dialog,menu,menuitem,summary,' +
			'content,element,shadow,template,blockquote,iframe,tfoot'
	)

	// this map is intentionally selective, only covering SVG elements that may
	// contain child elements.
	var isSVG = makeMap(
		'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
			'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
			'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
		true
	)

	var isPreTag = function (tag) {
		return tag === 'pre'
	}

	var isReservedTag = function (tag) {
		return isHTMLTag(tag) || isSVG(tag)
	}

	function getTagNamespace(tag) {
		if (isSVG(tag)) {
			return 'svg'
		}
		// basic support for MathML
		// note it doesn't support other MathML elements being component roots
		if (tag === 'math') {
			return 'math'
		}
	}

	var unknownElementCache = Object.create(null)
	function isUnknownElement(tag) {
		/* istanbul ignore if */
		if (!inBrowser) {
			return true
		}
		if (isReservedTag(tag)) {
			return false
		}
		tag = tag.toLowerCase()
		/* istanbul ignore if */
		if (unknownElementCache[tag] != null) {
			return unknownElementCache[tag]
		}
		var el = document.createElement(tag)
		if (tag.indexOf('-') > -1) {
			// http://stackoverflow.com/a/28210364/1070244
			return (unknownElementCache[tag] = el.constructor === window.HTMLUnknownElement || el.constructor === window.HTMLElement)
		} else {
			return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
		}
	}

	var isTextInputType = makeMap('text,number,password,search,email,tel,url')

	/*  */

	/**
	 * Query an element selector if it's not an element already.
	 */
	function query(el) {
		if (typeof el === 'string') {
			var selected = document.querySelector(el)
			if (!selected) {
				'development' !== 'production' && warn('Cannot find element: ' + el)
				return document.createElement('div')
			}
			return selected
		} else {
			return el
		}
	}

	/*  */

	function createElement$1(tagName, vnode) {
		var elm = document.createElement(tagName)
		if (tagName !== 'select') {
			return elm
		}
		// false or null will remove the attribute but undefined will not
		if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
			elm.setAttribute('multiple', 'multiple')
		}
		return elm
	}

	function createElementNS(namespace, tagName) {
		return document.createElementNS(namespaceMap[namespace], tagName)
	}

	function createTextNode(text) {
		return document.createTextNode(text)
	}

	function createComment(text) {
		return document.createComment(text)
	}

	function insertBefore(parentNode, newNode, referenceNode) {
		parentNode.insertBefore(newNode, referenceNode)
	}

	function removeChild(node, child) {
		node.removeChild(child)
	}

	function appendChild(node, child) {
		node.appendChild(child)
	}

	function parentNode(node) {
		return node.parentNode
	}

	function nextSibling(node) {
		return node.nextSibling
	}

	function tagName(node) {
		return node.tagName
	}

	function setTextContent(node, text) {
		node.textContent = text
	}

	function setStyleScope(node, scopeId) {
		node.setAttribute(scopeId, '')
	}

	var nodeOps = Object.freeze({
		createElement: createElement$1,
		createElementNS: createElementNS,
		createTextNode: createTextNode,
		createComment: createComment,
		insertBefore: insertBefore,
		removeChild: removeChild,
		appendChild: appendChild,
		parentNode: parentNode,
		nextSibling: nextSibling,
		tagName: tagName,
		setTextContent: setTextContent,
		setStyleScope: setStyleScope,
	})

	/*  */

	var ref = {
		create: function create(_, vnode) {
			registerRef(vnode)
		},
		update: function update(oldVnode, vnode) {
			if (oldVnode.data.ref !== vnode.data.ref) {
				registerRef(oldVnode, true)
				registerRef(vnode)
			}
		},
		destroy: function destroy(vnode) {
			registerRef(vnode, true)
		},
	}

	function registerRef(vnode, isRemoval) {
		var key = vnode.data.ref
		if (!isDef(key)) {
			return
		}

		var vm = vnode.context
		var ref = vnode.componentInstance || vnode.elm
		var refs = vm.$refs
		if (isRemoval) {
			if (Array.isArray(refs[key])) {
				remove(refs[key], ref)
			} else if (refs[key] === ref) {
				refs[key] = undefined
			}
		} else {
			if (vnode.data.refInFor) {
				if (!Array.isArray(refs[key])) {
					refs[key] = [ref]
				} else if (refs[key].indexOf(ref) < 0) {
					// $flow-disable-line
					refs[key].push(ref)
				}
			} else {
				refs[key] = ref
			}
		}
	}

	/**
	 * Virtual DOM patching algorithm based on Snabbdom by
	 * Simon Friis Vindum (@paldepind)
	 * Licensed under the MIT License
	 * https://github.com/paldepind/snabbdom/blob/master/LICENSE
	 *
	 * modified by Evan You (@yyx990803)
	 *
	 * Not type-checking this because this file is perf-critical and the cost
	 * of making flow understand it is not worth it.
	 */

	var emptyNode = new VNode('', {}, [])

	var hooks = ['create', 'activate', 'update', 'remove', 'destroy']

	function sameVnode(a, b) {
		return (
			a.key === b.key &&
			((a.tag === b.tag && a.isComment === b.isComment && isDef(a.data) === isDef(b.data) && sameInputType(a, b)) ||
				(isTrue(a.isAsyncPlaceholder) && a.asyncFactory === b.asyncFactory && isUndef(b.asyncFactory.error)))
		)
	}

	function sameInputType(a, b) {
		if (a.tag !== 'input') {
			return true
		}
		var i
		var typeA = isDef((i = a.data)) && isDef((i = i.attrs)) && i.type
		var typeB = isDef((i = b.data)) && isDef((i = i.attrs)) && i.type
		return typeA === typeB || (isTextInputType(typeA) && isTextInputType(typeB))
	}

	function createKeyToOldIdx(children, beginIdx, endIdx) {
		var i, key
		var map = {}
		for (i = beginIdx; i <= endIdx; ++i) {
			key = children[i].key
			if (isDef(key)) {
				map[key] = i
			}
		}
		return map
	}

	function createPatchFunction(backend) {
		var i, j
		var cbs = {}

		var modules = backend.modules
		var nodeOps = backend.nodeOps

		for (i = 0; i < hooks.length; ++i) {
			cbs[hooks[i]] = []
			for (j = 0; j < modules.length; ++j) {
				if (isDef(modules[j][hooks[i]])) {
					cbs[hooks[i]].push(modules[j][hooks[i]])
				}
			}
		}

		function emptyNodeAt(elm) {
			return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
		}

		function createRmCb(childElm, listeners) {
			function remove() {
				if (--remove.listeners === 0) {
					removeNode(childElm)
				}
			}
			remove.listeners = listeners
			return remove
		}

		function removeNode(el) {
			var parent = nodeOps.parentNode(el)
			// element may have already been removed due to v-html / v-text
			if (isDef(parent)) {
				nodeOps.removeChild(parent, el)
			}
		}

		function isUnknownElement$$1(vnode, inVPre) {
			return (
				!inVPre &&
				!vnode.ns &&
				!(
					config.ignoredElements.length &&
					config.ignoredElements.some(function (ignore) {
						return isRegExp(ignore) ? ignore.test(vnode.tag) : ignore === vnode.tag
					})
				) &&
				config.isUnknownElement(vnode.tag)
			)
		}

		var creatingElmInVPre = 0

		function createElm(vnode, insertedVnodeQueue, parentElm, refElm, nested, ownerArray, index) {
			if (isDef(vnode.elm) && isDef(ownerArray)) {
				// This vnode was used in a previous render!
				// now it's used as a new node, overwriting its elm would cause
				// potential patch errors down the road when it's used as an insertion
				// reference node. Instead, we clone the node on-demand before creating
				// associated DOM element for it.
				vnode = ownerArray[index] = cloneVNode(vnode)
			}

			vnode.isRootInsert = !nested // for transition enter check
			if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
				return
			}

			var data = vnode.data
			var children = vnode.children
			var tag = vnode.tag
			if (isDef(tag)) {
				{
					if (data && data.pre) {
						creatingElmInVPre++
					}
					if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
						warn(
							'Unknown custom element: <' +
								tag +
								'> - did you ' +
								'register the component correctly? For recursive components, ' +
								'make sure to provide the "name" option.',
							vnode.context
						)
					}
				}

				vnode.elm = vnode.ns ? nodeOps.createElementNS(vnode.ns, tag) : nodeOps.createElement(tag, vnode)
				setScope(vnode)

				/* istanbul ignore if */
				{
					createChildren(vnode, children, insertedVnodeQueue)
					if (isDef(data)) {
						invokeCreateHooks(vnode, insertedVnodeQueue)
					}
					insert(parentElm, vnode.elm, refElm)
				}

				if ('development' !== 'production' && data && data.pre) {
					creatingElmInVPre--
				}
			} else if (isTrue(vnode.isComment)) {
				vnode.elm = nodeOps.createComment(vnode.text)
				insert(parentElm, vnode.elm, refElm)
			} else {
				vnode.elm = nodeOps.createTextNode(vnode.text)
				insert(parentElm, vnode.elm, refElm)
			}
		}

		function createComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
			var i = vnode.data
			if (isDef(i)) {
				var isReactivated = isDef(vnode.componentInstance) && i.keepAlive
				if (isDef((i = i.hook)) && isDef((i = i.init))) {
					i(vnode, false /* hydrating */, parentElm, refElm)
				}
				// after calling the init hook, if the vnode is a child component
				// it should've created a child instance and mounted it. the child
				// component also has set the placeholder vnode's elm.
				// in that case we can just return the element and be done.
				if (isDef(vnode.componentInstance)) {
					initComponent(vnode, insertedVnodeQueue)
					if (isTrue(isReactivated)) {
						reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm)
					}
					return true
				}
			}
		}

		function initComponent(vnode, insertedVnodeQueue) {
			if (isDef(vnode.data.pendingInsert)) {
				insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert)
				vnode.data.pendingInsert = null
			}
			vnode.elm = vnode.componentInstance.$el
			if (isPatchable(vnode)) {
				invokeCreateHooks(vnode, insertedVnodeQueue)
				setScope(vnode)
			} else {
				// empty component root.
				// skip all element-related modules except for ref (#3455)
				registerRef(vnode)
				// make sure to invoke the insert hook
				insertedVnodeQueue.push(vnode)
			}
		}

		function reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
			var i
			// hack for #4339: a reactivated component with inner transition
			// does not trigger because the inner node's created hooks are not called
			// again. It's not ideal to involve module-specific logic in here but
			// there doesn't seem to be a better way to do it.
			var innerNode = vnode
			while (innerNode.componentInstance) {
				innerNode = innerNode.componentInstance._vnode
				if (isDef((i = innerNode.data)) && isDef((i = i.transition))) {
					for (i = 0; i < cbs.activate.length; ++i) {
						cbs.activate[i](emptyNode, innerNode)
					}
					insertedVnodeQueue.push(innerNode)
					break
				}
			}
			// unlike a newly created component,
			// a reactivated keep-alive component doesn't insert itself
			insert(parentElm, vnode.elm, refElm)
		}

		function insert(parent, elm, ref$$1) {
			if (isDef(parent)) {
				if (isDef(ref$$1)) {
					if (ref$$1.parentNode === parent) {
						nodeOps.insertBefore(parent, elm, ref$$1)
					}
				} else {
					nodeOps.appendChild(parent, elm)
				}
			}
		}

		function createChildren(vnode, children, insertedVnodeQueue) {
			if (Array.isArray(children)) {
				{
					checkDuplicateKeys(children)
				}
				for (var i = 0; i < children.length; ++i) {
					createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i)
				}
			} else if (isPrimitive(vnode.text)) {
				nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)))
			}
		}

		function isPatchable(vnode) {
			while (vnode.componentInstance) {
				vnode = vnode.componentInstance._vnode
			}
			return isDef(vnode.tag)
		}

		function invokeCreateHooks(vnode, insertedVnodeQueue) {
			for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
				cbs.create[i$1](emptyNode, vnode)
			}
			i = vnode.data.hook // Reuse variable
			if (isDef(i)) {
				if (isDef(i.create)) {
					i.create(emptyNode, vnode)
				}
				if (isDef(i.insert)) {
					insertedVnodeQueue.push(vnode)
				}
			}
		}

		// set scope id attribute for scoped CSS.
		// this is implemented as a special case to avoid the overhead
		// of going through the normal attribute patching process.
		function setScope(vnode) {
			var i
			if (isDef((i = vnode.fnScopeId))) {
				nodeOps.setStyleScope(vnode.elm, i)
			} else {
				var ancestor = vnode
				while (ancestor) {
					if (isDef((i = ancestor.context)) && isDef((i = i.$options._scopeId))) {
						nodeOps.setStyleScope(vnode.elm, i)
					}
					ancestor = ancestor.parent
				}
			}
			// for slot content they should also get the scopeId from the host instance.
			if (isDef((i = activeInstance)) && i !== vnode.context && i !== vnode.fnContext && isDef((i = i.$options._scopeId))) {
				nodeOps.setStyleScope(vnode.elm, i)
			}
		}

		function addVnodes(parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
			for (; startIdx <= endIdx; ++startIdx) {
				createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx)
			}
		}

		function invokeDestroyHook(vnode) {
			var i, j
			var data = vnode.data
			if (isDef(data)) {
				if (isDef((i = data.hook)) && isDef((i = i.destroy))) {
					i(vnode)
				}
				for (i = 0; i < cbs.destroy.length; ++i) {
					cbs.destroy[i](vnode)
				}
			}
			if (isDef((i = vnode.children))) {
				for (j = 0; j < vnode.children.length; ++j) {
					invokeDestroyHook(vnode.children[j])
				}
			}
		}

		function removeVnodes(parentElm, vnodes, startIdx, endIdx) {
			for (; startIdx <= endIdx; ++startIdx) {
				var ch = vnodes[startIdx]
				if (isDef(ch)) {
					if (isDef(ch.tag)) {
						removeAndInvokeRemoveHook(ch)
						invokeDestroyHook(ch)
					} else {
						// Text node
						removeNode(ch.elm)
					}
				}
			}
		}

		function removeAndInvokeRemoveHook(vnode, rm) {
			if (isDef(rm) || isDef(vnode.data)) {
				var i
				var listeners = cbs.remove.length + 1
				if (isDef(rm)) {
					// we have a recursively passed down rm callback
					// increase the listeners count
					rm.listeners += listeners
				} else {
					// directly removing
					rm = createRmCb(vnode.elm, listeners)
				}
				// recursively invoke hooks on child component root node
				if (isDef((i = vnode.componentInstance)) && isDef((i = i._vnode)) && isDef(i.data)) {
					removeAndInvokeRemoveHook(i, rm)
				}
				for (i = 0; i < cbs.remove.length; ++i) {
					cbs.remove[i](vnode, rm)
				}
				if (isDef((i = vnode.data.hook)) && isDef((i = i.remove))) {
					i(vnode, rm)
				} else {
					rm()
				}
			} else {
				removeNode(vnode.elm)
			}
		}

		function updateChildren(parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
			var oldStartIdx = 0
			var newStartIdx = 0
			var oldEndIdx = oldCh.length - 1
			var oldStartVnode = oldCh[0]
			var oldEndVnode = oldCh[oldEndIdx]
			var newEndIdx = newCh.length - 1
			var newStartVnode = newCh[0]
			var newEndVnode = newCh[newEndIdx]
			var oldKeyToIdx, idxInOld, vnodeToMove, refElm

			// removeOnly is a special flag used only by <transition-group>
			// to ensure removed elements stay in correct relative positions
			// during leaving transitions
			var canMove = !removeOnly

			{
				checkDuplicateKeys(newCh)
			}

			while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
				if (isUndef(oldStartVnode)) {
					oldStartVnode = oldCh[++oldStartIdx] // Vnode has been moved left
				} else if (isUndef(oldEndVnode)) {
					oldEndVnode = oldCh[--oldEndIdx]
				} else if (sameVnode(oldStartVnode, newStartVnode)) {
					patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue)
					oldStartVnode = oldCh[++oldStartIdx]
					newStartVnode = newCh[++newStartIdx]
				} else if (sameVnode(oldEndVnode, newEndVnode)) {
					patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue)
					oldEndVnode = oldCh[--oldEndIdx]
					newEndVnode = newCh[--newEndIdx]
				} else if (sameVnode(oldStartVnode, newEndVnode)) {
					// Vnode moved right
					patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue)
					canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm))
					oldStartVnode = oldCh[++oldStartIdx]
					newEndVnode = newCh[--newEndIdx]
				} else if (sameVnode(oldEndVnode, newStartVnode)) {
					// Vnode moved left
					patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue)
					canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm)
					oldEndVnode = oldCh[--oldEndIdx]
					newStartVnode = newCh[++newStartIdx]
				} else {
					if (isUndef(oldKeyToIdx)) {
						oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx)
					}
					idxInOld = isDef(newStartVnode.key) ? oldKeyToIdx[newStartVnode.key] : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx)
					if (isUndef(idxInOld)) {
						// New element
						createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx)
					} else {
						vnodeToMove = oldCh[idxInOld]
						if (sameVnode(vnodeToMove, newStartVnode)) {
							patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue)
							oldCh[idxInOld] = undefined
							canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm)
						} else {
							// same key but different element. treat as new element
							createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx)
						}
					}
					newStartVnode = newCh[++newStartIdx]
				}
			}
			if (oldStartIdx > oldEndIdx) {
				refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm
				addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue)
			} else if (newStartIdx > newEndIdx) {
				removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx)
			}
		}

		function checkDuplicateKeys(children) {
			var seenKeys = {}
			for (var i = 0; i < children.length; i++) {
				var vnode = children[i]
				var key = vnode.key
				if (isDef(key)) {
					if (seenKeys[key]) {
						warn("Duplicate keys detected: '" + key + "'. This may cause an update error.", vnode.context)
					} else {
						seenKeys[key] = true
					}
				}
			}
		}

		function findIdxInOld(node, oldCh, start, end) {
			for (var i = start; i < end; i++) {
				var c = oldCh[i]
				if (isDef(c) && sameVnode(node, c)) {
					return i
				}
			}
		}

		function patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly) {
			if (oldVnode === vnode) {
				return
			}

			var elm = (vnode.elm = oldVnode.elm)

			if (isTrue(oldVnode.isAsyncPlaceholder)) {
				if (isDef(vnode.asyncFactory.resolved)) {
					hydrate(oldVnode.elm, vnode, insertedVnodeQueue)
				} else {
					vnode.isAsyncPlaceholder = true
				}
				return
			}

			// reuse element for static trees.
			// note we only do this if the vnode is cloned -
			// if the new node is not cloned it means the render functions have been
			// reset by the hot-reload-api and we need to do a proper re-render.
			if (isTrue(vnode.isStatic) && isTrue(oldVnode.isStatic) && vnode.key === oldVnode.key && (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))) {
				vnode.componentInstance = oldVnode.componentInstance
				return
			}

			var i
			var data = vnode.data
			if (isDef(data) && isDef((i = data.hook)) && isDef((i = i.prepatch))) {
				i(oldVnode, vnode)
			}

			var oldCh = oldVnode.children
			var ch = vnode.children
			if (isDef(data) && isPatchable(vnode)) {
				for (i = 0; i < cbs.update.length; ++i) {
					cbs.update[i](oldVnode, vnode)
				}
				if (isDef((i = data.hook)) && isDef((i = i.update))) {
					i(oldVnode, vnode)
				}
			}
			if (isUndef(vnode.text)) {
				if (isDef(oldCh) && isDef(ch)) {
					if (oldCh !== ch) {
						updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly)
					}
				} else if (isDef(ch)) {
					if (isDef(oldVnode.text)) {
						nodeOps.setTextContent(elm, '')
					}
					addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue)
				} else if (isDef(oldCh)) {
					removeVnodes(elm, oldCh, 0, oldCh.length - 1)
				} else if (isDef(oldVnode.text)) {
					nodeOps.setTextContent(elm, '')
				}
			} else if (oldVnode.text !== vnode.text) {
				nodeOps.setTextContent(elm, vnode.text)
			}
			if (isDef(data)) {
				if (isDef((i = data.hook)) && isDef((i = i.postpatch))) {
					i(oldVnode, vnode)
				}
			}
		}

		function invokeInsertHook(vnode, queue, initial) {
			// delay insert hooks for component root nodes, invoke them after the
			// element is really inserted
			if (isTrue(initial) && isDef(vnode.parent)) {
				vnode.parent.data.pendingInsert = queue
			} else {
				for (var i = 0; i < queue.length; ++i) {
					queue[i].data.hook.insert(queue[i])
				}
			}
		}

		var hydrationBailed = false
		// list of modules that can skip create hook during hydration because they
		// are already rendered on the client or has no need for initialization
		// Note: style is excluded because it relies on initial clone for future
		// deep updates (#7063).
		var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key')

		// Note: this is a browser-only function so we can assume elms are DOM nodes.
		function hydrate(elm, vnode, insertedVnodeQueue, inVPre) {
			var i
			var tag = vnode.tag
			var data = vnode.data
			var children = vnode.children
			inVPre = inVPre || (data && data.pre)
			vnode.elm = elm

			if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
				vnode.isAsyncPlaceholder = true
				return true
			}
			// assert node match
			{
				if (!assertNodeMatch(elm, vnode, inVPre)) {
					return false
				}
			}
			if (isDef(data)) {
				if (isDef((i = data.hook)) && isDef((i = i.init))) {
					i(vnode, true /* hydrating */)
				}
				if (isDef((i = vnode.componentInstance))) {
					// child component. it should have hydrated its own tree.
					initComponent(vnode, insertedVnodeQueue)
					return true
				}
			}
			if (isDef(tag)) {
				if (isDef(children)) {
					// empty element, allow client to pick up and populate children
					if (!elm.hasChildNodes()) {
						createChildren(vnode, children, insertedVnodeQueue)
					} else {
						// v-html and domProps: innerHTML
						if (isDef((i = data)) && isDef((i = i.domProps)) && isDef((i = i.innerHTML))) {
							if (i !== elm.innerHTML) {
								/* istanbul ignore if */
								if ('development' !== 'production' && typeof console !== 'undefined' && !hydrationBailed) {
									hydrationBailed = true
									console.warn('Parent: ', elm)
									console.warn('server innerHTML: ', i)
									console.warn('client innerHTML: ', elm.innerHTML)
								}
								return false
							}
						} else {
							// iterate and compare children lists
							var childrenMatch = true
							var childNode = elm.firstChild
							for (var i$1 = 0; i$1 < children.length; i$1++) {
								if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
									childrenMatch = false
									break
								}
								childNode = childNode.nextSibling
							}
							// if childNode is not null, it means the actual childNodes list is
							// longer than the virtual children list.
							if (!childrenMatch || childNode) {
								/* istanbul ignore if */
								if ('development' !== 'production' && typeof console !== 'undefined' && !hydrationBailed) {
									hydrationBailed = true
									console.warn('Parent: ', elm)
									console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children)
								}
								return false
							}
						}
					}
				}
				if (isDef(data)) {
					var fullInvoke = false
					for (var key in data) {
						if (!isRenderedModule(key)) {
							fullInvoke = true
							invokeCreateHooks(vnode, insertedVnodeQueue)
							break
						}
					}
					if (!fullInvoke && data['class']) {
						// ensure collecting deps for deep class bindings for future updates
						traverse(data['class'])
					}
				}
			} else if (elm.data !== vnode.text) {
				elm.data = vnode.text
			}
			return true
		}

		function assertNodeMatch(node, vnode, inVPre) {
			if (isDef(vnode.tag)) {
				return (
					vnode.tag.indexOf('vue-component') === 0 ||
					(!isUnknownElement$$1(vnode, inVPre) && vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase()))
				)
			} else {
				return node.nodeType === (vnode.isComment ? 8 : 3)
			}
		}

		return function patch(oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
			if (isUndef(vnode)) {
				if (isDef(oldVnode)) {
					invokeDestroyHook(oldVnode)
				}
				return
			}

			var isInitialPatch = false
			var insertedVnodeQueue = []

			if (isUndef(oldVnode)) {
				// empty mount (likely as component), create new root element
				isInitialPatch = true
				createElm(vnode, insertedVnodeQueue, parentElm, refElm)
			} else {
				var isRealElement = isDef(oldVnode.nodeType)
				if (!isRealElement && sameVnode(oldVnode, vnode)) {
					// patch existing root node
					patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly)
				} else {
					if (isRealElement) {
						// mounting to a real element
						// check if this is server-rendered content and if we can perform
						// a successful hydration.
						if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
							oldVnode.removeAttribute(SSR_ATTR)
							hydrating = true
						}
						if (isTrue(hydrating)) {
							if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
								invokeInsertHook(vnode, insertedVnodeQueue, true)
								return oldVnode
							} else {
								warn(
									'The client-side rendered virtual DOM tree is not matching ' +
										'server-rendered content. This is likely caused by incorrect ' +
										'HTML markup, for example nesting block-level elements inside ' +
										'<p>, or missing <tbody>. Bailing hydration and performing ' +
										'full client-side render.'
								)
							}
						}
						// either not server-rendered, or hydration failed.
						// create an empty node and replace it
						oldVnode = emptyNodeAt(oldVnode)
					}

					// replacing existing element
					var oldElm = oldVnode.elm
					var parentElm$1 = nodeOps.parentNode(oldElm)

					// create new node
					createElm(
						vnode,
						insertedVnodeQueue,
						// extremely rare edge case: do not insert if old element is in a
						// leaving transition. Only happens when combining transition +
						// keep-alive + HOCs. (#4590)
						oldElm._leaveCb ? null : parentElm$1,
						nodeOps.nextSibling(oldElm)
					)

					// update parent placeholder node element, recursively
					if (isDef(vnode.parent)) {
						var ancestor = vnode.parent
						var patchable = isPatchable(vnode)
						while (ancestor) {
							for (var i = 0; i < cbs.destroy.length; ++i) {
								cbs.destroy[i](ancestor)
							}
							ancestor.elm = vnode.elm
							if (patchable) {
								for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
									cbs.create[i$1](emptyNode, ancestor)
								}
								// #6513
								// invoke insert hooks that may have been merged by create hooks.
								// e.g. for directives that uses the "inserted" hook.
								var insert = ancestor.data.hook.insert
								if (insert.merged) {
									// start at index 1 to avoid re-invoking component mounted hook
									for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
										insert.fns[i$2]()
									}
								}
							} else {
								registerRef(ancestor)
							}
							ancestor = ancestor.parent
						}
					}

					// destroy old node
					if (isDef(parentElm$1)) {
						removeVnodes(parentElm$1, [oldVnode], 0, 0)
					} else if (isDef(oldVnode.tag)) {
						invokeDestroyHook(oldVnode)
					}
				}
			}

			invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch)
			return vnode.elm
		}
	}

	/*  */

	var directives = {
		create: updateDirectives,
		update: updateDirectives,
		destroy: function unbindDirectives(vnode) {
			updateDirectives(vnode, emptyNode)
		},
	}

	function updateDirectives(oldVnode, vnode) {
		if (oldVnode.data.directives || vnode.data.directives) {
			_update(oldVnode, vnode)
		}
	}

	function _update(oldVnode, vnode) {
		var isCreate = oldVnode === emptyNode
		var isDestroy = vnode === emptyNode
		var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context)
		var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context)

		var dirsWithInsert = []
		var dirsWithPostpatch = []

		var key, oldDir, dir
		for (key in newDirs) {
			oldDir = oldDirs[key]
			dir = newDirs[key]
			if (!oldDir) {
				// new directive, bind
				callHook$1(dir, 'bind', vnode, oldVnode)
				if (dir.def && dir.def.inserted) {
					dirsWithInsert.push(dir)
				}
			} else {
				// existing directive, update
				dir.oldValue = oldDir.value
				callHook$1(dir, 'update', vnode, oldVnode)
				if (dir.def && dir.def.componentUpdated) {
					dirsWithPostpatch.push(dir)
				}
			}
		}

		if (dirsWithInsert.length) {
			var callInsert = function () {
				for (var i = 0; i < dirsWithInsert.length; i++) {
					callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode)
				}
			}
			if (isCreate) {
				mergeVNodeHook(vnode, 'insert', callInsert)
			} else {
				callInsert()
			}
		}

		if (dirsWithPostpatch.length) {
			mergeVNodeHook(vnode, 'postpatch', function () {
				for (var i = 0; i < dirsWithPostpatch.length; i++) {
					callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode)
				}
			})
		}

		if (!isCreate) {
			for (key in oldDirs) {
				if (!newDirs[key]) {
					// no longer present, unbind
					callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy)
				}
			}
		}
	}

	var emptyModifiers = Object.create(null)

	function normalizeDirectives$1(dirs, vm) {
		var res = Object.create(null)
		if (!dirs) {
			// $flow-disable-line
			return res
		}
		var i, dir
		for (i = 0; i < dirs.length; i++) {
			dir = dirs[i]
			if (!dir.modifiers) {
				// $flow-disable-line
				dir.modifiers = emptyModifiers
			}
			res[getRawDirName(dir)] = dir
			dir.def = resolveAsset(vm.$options, 'directives', dir.name, true)
		}
		// $flow-disable-line
		return res
	}

	function getRawDirName(dir) {
		return dir.rawName || dir.name + '.' + Object.keys(dir.modifiers || {}).join('.')
	}

	function callHook$1(dir, hook, vnode, oldVnode, isDestroy) {
		var fn = dir.def && dir.def[hook]
		if (fn) {
			try {
				fn(vnode.elm, dir, vnode, oldVnode, isDestroy)
			} catch (e) {
				handleError(e, vnode.context, 'directive ' + dir.name + ' ' + hook + ' hook')
			}
		}
	}

	var baseModules = [ref, directives]

	/*  */

	function updateAttrs(oldVnode, vnode) {
		var opts = vnode.componentOptions
		if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
			return
		}
		if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
			return
		}
		var key, cur, old
		var elm = vnode.elm
		var oldAttrs = oldVnode.data.attrs || {}
		var attrs = vnode.data.attrs || {}
		// clone observed objects, as the user probably wants to mutate it
		if (isDef(attrs.__ob__)) {
			attrs = vnode.data.attrs = extend({}, attrs)
		}

		for (key in attrs) {
			cur = attrs[key]
			old = oldAttrs[key]
			if (old !== cur) {
				setAttr(elm, key, cur)
			}
		}
		// #4391: in IE9, setting type can reset value for input[type=radio]
		// #6666: IE/Edge forces progress value down to 1 before setting a max
		/* istanbul ignore if */
		if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
			setAttr(elm, 'value', attrs.value)
		}
		for (key in oldAttrs) {
			if (isUndef(attrs[key])) {
				if (isXlink(key)) {
					elm.removeAttributeNS(xlinkNS, getXlinkProp(key))
				} else if (!isEnumeratedAttr(key)) {
					elm.removeAttribute(key)
				}
			}
		}
	}

	function setAttr(el, key, value) {
		if (el.tagName.indexOf('-') > -1) {
			baseSetAttr(el, key, value)
		} else if (isBooleanAttr(key)) {
			// set attribute for blank value
			// e.g. <option disabled>Select one</option>
			if (isFalsyAttrValue(value)) {
				el.removeAttribute(key)
			} else {
				// technically allowfullscreen is a boolean attribute for <iframe>,
				// but Flash expects a value of "true" when used on <embed> tag
				value = key === 'allowfullscreen' && el.tagName === 'EMBED' ? 'true' : key
				el.setAttribute(key, value)
			}
		} else if (isEnumeratedAttr(key)) {
			el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true')
		} else if (isXlink(key)) {
			if (isFalsyAttrValue(value)) {
				el.removeAttributeNS(xlinkNS, getXlinkProp(key))
			} else {
				el.setAttributeNS(xlinkNS, key, value)
			}
		} else {
			baseSetAttr(el, key, value)
		}
	}

	function baseSetAttr(el, key, value) {
		if (isFalsyAttrValue(value)) {
			el.removeAttribute(key)
		} else {
			// #7138: IE10 & 11 fires input event when setting placeholder on
			// <textarea>... block the first input event and remove the blocker
			// immediately.
			/* istanbul ignore if */
			if (isIE && !isIE9 && el.tagName === 'TEXTAREA' && key === 'placeholder' && !el.__ieph) {
				var blocker = function (e) {
					e.stopImmediatePropagation()
					el.removeEventListener('input', blocker)
				}
				el.addEventListener('input', blocker)
				// $flow-disable-line
				el.__ieph = true /* IE placeholder patched */
			}
			el.setAttribute(key, value)
		}
	}

	var attrs = {
		create: updateAttrs,
		update: updateAttrs,
	}

	/*  */

	function updateClass(oldVnode, vnode) {
		var el = vnode.elm
		var data = vnode.data
		var oldData = oldVnode.data
		if (isUndef(data.staticClass) && isUndef(data.class) && (isUndef(oldData) || (isUndef(oldData.staticClass) && isUndef(oldData.class)))) {
			return
		}

		var cls = genClassForVnode(vnode)

		// handle transition classes
		var transitionClass = el._transitionClasses
		if (isDef(transitionClass)) {
			cls = concat(cls, stringifyClass(transitionClass))
		}

		// set the class
		if (cls !== el._prevClass) {
			el.setAttribute('class', cls)
			el._prevClass = cls
		}
	}

	var klass = {
		create: updateClass,
		update: updateClass,
	}

	/*  */

	var validDivisionCharRE = /[\w).+\-_$\]]/

	function parseFilters(exp) {
		var inSingle = false
		var inDouble = false
		var inTemplateString = false
		var inRegex = false
		var curly = 0
		var square = 0
		var paren = 0
		var lastFilterIndex = 0
		var c, prev, i, expression, filters

		for (i = 0; i < exp.length; i++) {
			prev = c
			c = exp.charCodeAt(i)
			if (inSingle) {
				if (c === 0x27 && prev !== 0x5c) {
					inSingle = false
				}
			} else if (inDouble) {
				if (c === 0x22 && prev !== 0x5c) {
					inDouble = false
				}
			} else if (inTemplateString) {
				if (c === 0x60 && prev !== 0x5c) {
					inTemplateString = false
				}
			} else if (inRegex) {
				if (c === 0x2f && prev !== 0x5c) {
					inRegex = false
				}
			} else if (
				c === 0x7c && // pipe
				exp.charCodeAt(i + 1) !== 0x7c &&
				exp.charCodeAt(i - 1) !== 0x7c &&
				!curly &&
				!square &&
				!paren
			) {
				if (expression === undefined) {
					// first filter, end of expression
					lastFilterIndex = i + 1
					expression = exp.slice(0, i).trim()
				} else {
					pushFilter()
				}
			} else {
				switch (c) {
					case 0x22:
						inDouble = true
						break // "
					case 0x27:
						inSingle = true
						break // '
					case 0x60:
						inTemplateString = true
						break // `
					case 0x28:
						paren++
						break // (
					case 0x29:
						paren--
						break // )
					case 0x5b:
						square++
						break // [
					case 0x5d:
						square--
						break // ]
					case 0x7b:
						curly++
						break // {
					case 0x7d:
						curly--
						break // }
				}
				if (c === 0x2f) {
					// /
					var j = i - 1
					var p = void 0
					// find first non-whitespace prev char
					for (; j >= 0; j--) {
						p = exp.charAt(j)
						if (p !== ' ') {
							break
						}
					}
					if (!p || !validDivisionCharRE.test(p)) {
						inRegex = true
					}
				}
			}
		}

		if (expression === undefined) {
			expression = exp.slice(0, i).trim()
		} else if (lastFilterIndex !== 0) {
			pushFilter()
		}

		function pushFilter() {
			;(filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim())
			lastFilterIndex = i + 1
		}

		if (filters) {
			for (i = 0; i < filters.length; i++) {
				expression = wrapFilter(expression, filters[i])
			}
		}

		return expression
	}

	function wrapFilter(exp, filter) {
		var i = filter.indexOf('(')
		if (i < 0) {
			// _f: resolveFilter
			return '_f("' + filter + '")(' + exp + ')'
		} else {
			var name = filter.slice(0, i)
			var args = filter.slice(i + 1)
			return '_f("' + name + '")(' + exp + (args !== ')' ? ',' + args : args)
		}
	}

	/*  */

	function baseWarn(msg) {
		console.error('[Vue compiler]: ' + msg)
	}

	function pluckModuleFunction(modules, key) {
		return modules
			? modules
					.map(function (m) {
						return m[key]
					})
					.filter(function (_) {
						return _
					})
			: []
	}

	function addProp(el, name, value) {
		;(el.props || (el.props = [])).push({ name: name, value: value })
		el.plain = false
	}

	function addAttr(el, name, value) {
		;(el.attrs || (el.attrs = [])).push({ name: name, value: value })
		el.plain = false
	}

	// add a raw attr (use this in preTransforms)
	function addRawAttr(el, name, value) {
		el.attrsMap[name] = value
		el.attrsList.push({ name: name, value: value })
	}

	function addDirective(el, name, rawName, value, arg, modifiers) {
		;(el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers })
		el.plain = false
	}

	function addHandler(el, name, value, modifiers, important, warn) {
		modifiers = modifiers || emptyObject
		// warn prevent and passive modifier
		/* istanbul ignore if */
		if ('development' !== 'production' && warn && modifiers.prevent && modifiers.passive) {
			warn("passive and prevent can't be used together. " + "Passive handler can't prevent default event.")
		}

		// check capture modifier
		if (modifiers.capture) {
			delete modifiers.capture
			name = '!' + name // mark the event as captured
		}
		if (modifiers.once) {
			delete modifiers.once
			name = '~' + name // mark the event as once
		}
		/* istanbul ignore if */
		if (modifiers.passive) {
			delete modifiers.passive
			name = '&' + name // mark the event as passive
		}

		// normalize click.right and click.middle since they don't actually fire
		// this is technically browser-specific, but at least for now browsers are
		// the only target envs that have right/middle clicks.
		if (name === 'click') {
			if (modifiers.right) {
				name = 'contextmenu'
				delete modifiers.right
			} else if (modifiers.middle) {
				name = 'mouseup'
			}
		}

		var events
		if (modifiers.native) {
			delete modifiers.native
			events = el.nativeEvents || (el.nativeEvents = {})
		} else {
			events = el.events || (el.events = {})
		}

		var newHandler = {
			value: value.trim(),
		}
		if (modifiers !== emptyObject) {
			newHandler.modifiers = modifiers
		}

		var handlers = events[name]
		/* istanbul ignore if */
		if (Array.isArray(handlers)) {
			important ? handlers.unshift(newHandler) : handlers.push(newHandler)
		} else if (handlers) {
			events[name] = important ? [newHandler, handlers] : [handlers, newHandler]
		} else {
			events[name] = newHandler
		}

		el.plain = false
	}

	function getBindingAttr(el, name, getStatic) {
		var dynamicValue = getAndRemoveAttr(el, ':' + name) || getAndRemoveAttr(el, 'v-bind:' + name)
		if (dynamicValue != null) {
			return parseFilters(dynamicValue)
		} else if (getStatic !== false) {
			var staticValue = getAndRemoveAttr(el, name)
			if (staticValue != null) {
				return JSON.stringify(staticValue)
			}
		}
	}

	// note: this only removes the attr from the Array (attrsList) so that it
	// doesn't get processed by processAttrs.
	// By default it does NOT remove it from the map (attrsMap) because the map is
	// needed during codegen.
	function getAndRemoveAttr(el, name, removeFromMap) {
		var val
		if ((val = el.attrsMap[name]) != null) {
			var list = el.attrsList
			for (var i = 0, l = list.length; i < l; i++) {
				if (list[i].name === name) {
					list.splice(i, 1)
					break
				}
			}
		}
		if (removeFromMap) {
			delete el.attrsMap[name]
		}
		return val
	}

	/*  */

	/**
	 * Cross-platform code generation for component v-model
	 */
	function genComponentModel(el, value, modifiers) {
		var ref = modifiers || {}
		var number = ref.number
		var trim = ref.trim

		var baseValueExpression = '$$v'
		var valueExpression = baseValueExpression
		if (trim) {
			valueExpression = '(typeof ' + baseValueExpression + " === 'string'" + '? ' + baseValueExpression + '.trim()' + ': ' + baseValueExpression + ')'
		}
		if (number) {
			valueExpression = '_n(' + valueExpression + ')'
		}
		var assignment = genAssignmentCode(value, valueExpression)

		el.model = {
			value: '(' + value + ')',
			expression: '"' + value + '"',
			callback: 'function (' + baseValueExpression + ') {' + assignment + '}',
		}
	}

	/**
	 * Cross-platform codegen helper for generating v-model value assignment code.
	 */
	function genAssignmentCode(value, assignment) {
		var res = parseModel(value)
		if (res.key === null) {
			return value + '=' + assignment
		} else {
			return '$set(' + res.exp + ', ' + res.key + ', ' + assignment + ')'
		}
	}

	/**
	 * Parse a v-model expression into a base path and a final key segment.
	 * Handles both dot-path and possible square brackets.
	 *
	 * Possible cases:
	 *
	 * - test
	 * - test[key]
	 * - test[test1[key]]
	 * - test["a"][key]
	 * - xxx.test[a[a].test1[key]]
	 * - test.xxx.a["asa"][test1[key]]
	 *
	 */

	var len
	var str
	var chr
	var index$1
	var expressionPos
	var expressionEndPos

	function parseModel(val) {
		// Fix https://github.com/vuejs/vue/pull/7730
		// allow v-model="obj.val " (trailing whitespace)
		val = val.trim()
		len = val.length

		if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
			index$1 = val.lastIndexOf('.')
			if (index$1 > -1) {
				return {
					exp: val.slice(0, index$1),
					key: '"' + val.slice(index$1 + 1) + '"',
				}
			} else {
				return {
					exp: val,
					key: null,
				}
			}
		}

		str = val
		index$1 = expressionPos = expressionEndPos = 0

		while (!eof()) {
			chr = next()
			/* istanbul ignore if */
			if (isStringStart(chr)) {
				parseString(chr)
			} else if (chr === 0x5b) {
				parseBracket(chr)
			}
		}

		return {
			exp: val.slice(0, expressionPos),
			key: val.slice(expressionPos + 1, expressionEndPos),
		}
	}

	function next() {
		return str.charCodeAt(++index$1)
	}

	function eof() {
		return index$1 >= len
	}

	function isStringStart(chr) {
		return chr === 0x22 || chr === 0x27
	}

	function parseBracket(chr) {
		var inBracket = 1
		expressionPos = index$1
		while (!eof()) {
			chr = next()
			if (isStringStart(chr)) {
				parseString(chr)
				continue
			}
			if (chr === 0x5b) {
				inBracket++
			}
			if (chr === 0x5d) {
				inBracket--
			}
			if (inBracket === 0) {
				expressionEndPos = index$1
				break
			}
		}
	}

	function parseString(chr) {
		var stringQuote = chr
		while (!eof()) {
			chr = next()
			if (chr === stringQuote) {
				break
			}
		}
	}

	/*  */

	var warn$1

	// in some cases, the event used has to be determined at runtime
	// so we used some reserved tokens during compile.
	var RANGE_TOKEN = '__r'
	var CHECKBOX_RADIO_TOKEN = '__c'

	function model(el, dir, _warn) {
		warn$1 = _warn
		var value = dir.value
		var modifiers = dir.modifiers
		var tag = el.tag
		var type = el.attrsMap.type

		{
			// inputs with type="file" are read only and setting the input's
			// value will throw an error.
			if (tag === 'input' && type === 'file') {
				warn$1('<' + el.tag + ' v-model="' + value + '" type="file">:\n' + 'File inputs are read only. Use a v-on:change listener instead.')
			}
		}

		if (el.component) {
			genComponentModel(el, value, modifiers)
			// component v-model doesn't need extra runtime
			return false
		} else if (tag === 'select') {
			genSelect(el, value, modifiers)
		} else if (tag === 'input' && type === 'checkbox') {
			genCheckboxModel(el, value, modifiers)
		} else if (tag === 'input' && type === 'radio') {
			genRadioModel(el, value, modifiers)
		} else if (tag === 'input' || tag === 'textarea') {
			genDefaultModel(el, value, modifiers)
		} else if (!config.isReservedTag(tag)) {
			genComponentModel(el, value, modifiers)
			// component v-model doesn't need extra runtime
			return false
		} else {
			warn$1(
				'<' +
					el.tag +
					' v-model="' +
					value +
					'">: ' +
					'v-model is not supported on this element type. ' +
					"If you are working with contenteditable, it's recommended to " +
					'wrap a library dedicated for that purpose inside a custom component.'
			)
		}

		// ensure runtime directive metadata
		return true
	}

	function genCheckboxModel(el, value, modifiers) {
		var number = modifiers && modifiers.number
		var valueBinding = getBindingAttr(el, 'value') || 'null'
		var trueValueBinding = getBindingAttr(el, 'true-value') || 'true'
		var falseValueBinding = getBindingAttr(el, 'false-value') || 'false'
		addProp(
			el,
			'checked',
			'Array.isArray(' +
				value +
				')' +
				'?_i(' +
				value +
				',' +
				valueBinding +
				')>-1' +
				(trueValueBinding === 'true' ? ':(' + value + ')' : ':_q(' + value + ',' + trueValueBinding + ')')
		)
		addHandler(
			el,
			'change',
			'var $$a=' +
				value +
				',' +
				'$$el=$event.target,' +
				'$$c=$$el.checked?(' +
				trueValueBinding +
				'):(' +
				falseValueBinding +
				');' +
				'if(Array.isArray($$a)){' +
				'var $$v=' +
				(number ? '_n(' + valueBinding + ')' : valueBinding) +
				',' +
				'$$i=_i($$a,$$v);' +
				'if($$el.checked){$$i<0&&(' +
				genAssignmentCode(value, '$$a.concat([$$v])') +
				')}' +
				'else{$$i>-1&&(' +
				genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))') +
				')}' +
				'}else{' +
				genAssignmentCode(value, '$$c') +
				'}',
			null,
			true
		)
	}

	function genRadioModel(el, value, modifiers) {
		var number = modifiers && modifiers.number
		var valueBinding = getBindingAttr(el, 'value') || 'null'
		valueBinding = number ? '_n(' + valueBinding + ')' : valueBinding
		addProp(el, 'checked', '_q(' + value + ',' + valueBinding + ')')
		addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true)
	}

	function genSelect(el, value, modifiers) {
		var number = modifiers && modifiers.number
		var selectedVal =
			'Array.prototype.filter' +
			'.call($event.target.options,function(o){return o.selected})' +
			'.map(function(o){var val = "_value" in o ? o._value : o.value;' +
			'return ' +
			(number ? '_n(val)' : 'val') +
			'})'

		var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]'
		var code = 'var $$selectedVal = ' + selectedVal + ';'
		code = code + ' ' + genAssignmentCode(value, assignment)
		addHandler(el, 'change', code, null, true)
	}

	function genDefaultModel(el, value, modifiers) {
		var type = el.attrsMap.type

		// warn if v-bind:value conflicts with v-model
		// except for inputs with v-bind:type
		{
			var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value']
			var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type']
			if (value$1 && !typeBinding) {
				var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value'
				warn$1(
					binding +
						'="' +
						value$1 +
						'" conflicts with v-model on the same element ' +
						'because the latter already expands to a value binding internally'
				)
			}
		}

		var ref = modifiers || {}
		var lazy = ref.lazy
		var number = ref.number
		var trim = ref.trim
		var needCompositionGuard = !lazy && type !== 'range'
		var event = lazy ? 'change' : type === 'range' ? RANGE_TOKEN : 'input'

		var valueExpression = '$event.target.value'
		if (trim) {
			valueExpression = '$event.target.value.trim()'
		}
		if (number) {
			valueExpression = '_n(' + valueExpression + ')'
		}

		var code = genAssignmentCode(value, valueExpression)
		if (needCompositionGuard) {
			code = 'if($event.target.composing)return;' + code
		}

		addProp(el, 'value', '(' + value + ')')
		addHandler(el, event, code, null, true)
		if (trim || number) {
			addHandler(el, 'blur', '$forceUpdate()')
		}
	}

	/*  */

	// normalize v-model event tokens that can only be determined at runtime.
	// it's important to place the event as the first in the array because
	// the whole point is ensuring the v-model callback gets called before
	// user-attached handlers.
	function normalizeEvents(on) {
		/* istanbul ignore if */
		if (isDef(on[RANGE_TOKEN])) {
			// IE input[type=range] only supports `change` event
			var event = isIE ? 'change' : 'input'
			on[event] = [].concat(on[RANGE_TOKEN], on[event] || [])
			delete on[RANGE_TOKEN]
		}
		// This was originally intended to fix #4521 but no longer necessary
		// after 2.5. Keeping it for backwards compat with generated code from < 2.4
		/* istanbul ignore if */
		if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
			on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || [])
			delete on[CHECKBOX_RADIO_TOKEN]
		}
	}

	var target$1

	function createOnceHandler(handler, event, capture) {
		var _target = target$1 // save current target element in closure
		return function onceHandler() {
			var res = handler.apply(null, arguments)
			if (res !== null) {
				remove$2(event, onceHandler, capture, _target)
			}
		}
	}

	function add$1(event, handler, once$$1, capture, passive) {
		handler = withMacroTask(handler)
		if (once$$1) {
			handler = createOnceHandler(handler, event, capture)
		}
		target$1.addEventListener(event, handler, supportsPassive ? { capture: capture, passive: passive } : capture)
	}

	function remove$2(event, handler, capture, _target) {
		;(_target || target$1).removeEventListener(event, handler._withTask || handler, capture)
	}

	function updateDOMListeners(oldVnode, vnode) {
		if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
			return
		}
		var on = vnode.data.on || {}
		var oldOn = oldVnode.data.on || {}
		target$1 = vnode.elm
		normalizeEvents(on)
		updateListeners(on, oldOn, add$1, remove$2, vnode.context)
		target$1 = undefined
	}

	var events = {
		create: updateDOMListeners,
		update: updateDOMListeners,
	}

	/*  */

	function updateDOMProps(oldVnode, vnode) {
		if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
			return
		}
		var key, cur
		var elm = vnode.elm
		var oldProps = oldVnode.data.domProps || {}
		var props = vnode.data.domProps || {}
		// clone observed objects, as the user probably wants to mutate it
		if (isDef(props.__ob__)) {
			props = vnode.data.domProps = extend({}, props)
		}

		for (key in oldProps) {
			if (isUndef(props[key])) {
				elm[key] = ''
			}
		}
		for (key in props) {
			cur = props[key]
			// ignore children if the node has textContent or innerHTML,
			// as these will throw away existing DOM nodes and cause removal errors
			// on subsequent patches (#3360)
			if (key === 'textContent' || key === 'innerHTML') {
				if (vnode.children) {
					vnode.children.length = 0
				}
				if (cur === oldProps[key]) {
					continue
				}
				// #6601 work around Chrome version <= 55 bug where single textNode
				// replaced by innerHTML/textContent retains its parentNode property
				if (elm.childNodes.length === 1) {
					elm.removeChild(elm.childNodes[0])
				}
			}

			if (key === 'value') {
				// store value as _value as well since
				// non-string values will be stringified
				elm._value = cur
				// avoid resetting cursor position when value is the same
				var strCur = isUndef(cur) ? '' : String(cur)
				if (shouldUpdateValue(elm, strCur)) {
					elm.value = strCur
				}
			} else {
				elm[key] = cur
			}
		}
	}

	// check platforms/web/util/attrs.js acceptValue

	function shouldUpdateValue(elm, checkVal) {
		return !elm.composing && (elm.tagName === 'OPTION' || isNotInFocusAndDirty(elm, checkVal) || isDirtyWithModifiers(elm, checkVal))
	}

	function isNotInFocusAndDirty(elm, checkVal) {
		// return true when textbox (.number and .trim) loses focus and its value is
		// not equal to the updated value
		var notInFocus = true
		// #6157
		// work around IE bug when accessing document.activeElement in an iframe
		try {
			notInFocus = document.activeElement !== elm
		} catch (e) {}
		return notInFocus && elm.value !== checkVal
	}

	function isDirtyWithModifiers(elm, newVal) {
		var value = elm.value
		var modifiers = elm._vModifiers // injected by v-model runtime
		if (isDef(modifiers)) {
			if (modifiers.lazy) {
				// inputs with lazy should only be updated when not in focus
				return false
			}
			if (modifiers.number) {
				return toNumber(value) !== toNumber(newVal)
			}
			if (modifiers.trim) {
				return value.trim() !== newVal.trim()
			}
		}
		return value !== newVal
	}

	var domProps = {
		create: updateDOMProps,
		update: updateDOMProps,
	}

	/*  */

	var parseStyleText = cached(function (cssText) {
		var res = {}
		var listDelimiter = /;(?![^(]*\))/g
		var propertyDelimiter = /:(.+)/
		cssText.split(listDelimiter).forEach(function (item) {
			if (item) {
				var tmp = item.split(propertyDelimiter)
				tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim())
			}
		})
		return res
	})

	// merge static and dynamic style data on the same vnode
	function normalizeStyleData(data) {
		var style = normalizeStyleBinding(data.style)
		// static style is pre-processed into an object during compilation
		// and is always a fresh object, so it's safe to merge into it
		return data.staticStyle ? extend(data.staticStyle, style) : style
	}

	// normalize possible array / string values into Object
	function normalizeStyleBinding(bindingStyle) {
		if (Array.isArray(bindingStyle)) {
			return toObject(bindingStyle)
		}
		if (typeof bindingStyle === 'string') {
			return parseStyleText(bindingStyle)
		}
		return bindingStyle
	}

	/**
	 * parent component style should be after child's
	 * so that parent component's style could override it
	 */
	function getStyle(vnode, checkChild) {
		var res = {}
		var styleData

		if (checkChild) {
			var childNode = vnode
			while (childNode.componentInstance) {
				childNode = childNode.componentInstance._vnode
				if (childNode && childNode.data && (styleData = normalizeStyleData(childNode.data))) {
					extend(res, styleData)
				}
			}
		}

		if ((styleData = normalizeStyleData(vnode.data))) {
			extend(res, styleData)
		}

		var parentNode = vnode
		while ((parentNode = parentNode.parent)) {
			if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
				extend(res, styleData)
			}
		}
		return res
	}

	/*  */

	var cssVarRE = /^--/
	var importantRE = /\s*!important$/
	var setProp = function (el, name, val) {
		/* istanbul ignore if */
		if (cssVarRE.test(name)) {
			el.style.setProperty(name, val)
		} else if (importantRE.test(val)) {
			el.style.setProperty(name, val.replace(importantRE, ''), 'important')
		} else {
			var normalizedName = normalize(name)
			if (Array.isArray(val)) {
				// Support values array created by autoprefixer, e.g.
				// {display: ["-webkit-box", "-ms-flexbox", "flex"]}
				// Set them one by one, and the browser will only set those it can recognize
				for (var i = 0, len = val.length; i < len; i++) {
					el.style[normalizedName] = val[i]
				}
			} else {
				el.style[normalizedName] = val
			}
		}
	}

	var vendorNames = ['Webkit', 'Moz', 'ms']

	var emptyStyle
	var normalize = cached(function (prop) {
		emptyStyle = emptyStyle || document.createElement('div').style
		prop = camelize(prop)
		if (prop !== 'filter' && prop in emptyStyle) {
			return prop
		}
		var capName = prop.charAt(0).toUpperCase() + prop.slice(1)
		for (var i = 0; i < vendorNames.length; i++) {
			var name = vendorNames[i] + capName
			if (name in emptyStyle) {
				return name
			}
		}
	})

	function updateStyle(oldVnode, vnode) {
		var data = vnode.data
		var oldData = oldVnode.data

		if (isUndef(data.staticStyle) && isUndef(data.style) && isUndef(oldData.staticStyle) && isUndef(oldData.style)) {
			return
		}

		var cur, name
		var el = vnode.elm
		var oldStaticStyle = oldData.staticStyle
		var oldStyleBinding = oldData.normalizedStyle || oldData.style || {}

		// if static style exists, stylebinding already merged into it when doing normalizeStyleData
		var oldStyle = oldStaticStyle || oldStyleBinding

		var style = normalizeStyleBinding(vnode.data.style) || {}

		// store normalized style under a different key for next diff
		// make sure to clone it if it's reactive, since the user likely wants
		// to mutate it.
		vnode.data.normalizedStyle = isDef(style.__ob__) ? extend({}, style) : style

		var newStyle = getStyle(vnode, true)

		for (name in oldStyle) {
			if (isUndef(newStyle[name])) {
				setProp(el, name, '')
			}
		}
		for (name in newStyle) {
			cur = newStyle[name]
			if (cur !== oldStyle[name]) {
				// ie9 setting to null has no effect, must use empty string
				setProp(el, name, cur == null ? '' : cur)
			}
		}
	}

	var style = {
		create: updateStyle,
		update: updateStyle,
	}

	/*  */

	/**
	 * Add class with compatibility for SVG since classList is not supported on
	 * SVG elements in IE
	 */
	function addClass(el, cls) {
		/* istanbul ignore if */
		if (!cls || !(cls = cls.trim())) {
			return
		}

		/* istanbul ignore else */
		if (el.classList) {
			if (cls.indexOf(' ') > -1) {
				cls.split(/\s+/).forEach(function (c) {
					return el.classList.add(c)
				})
			} else {
				el.classList.add(cls)
			}
		} else {
			var cur = ' ' + (el.getAttribute('class') || '') + ' '
			if (cur.indexOf(' ' + cls + ' ') < 0) {
				el.setAttribute('class', (cur + cls).trim())
			}
		}
	}

	/**
	 * Remove class with compatibility for SVG since classList is not supported on
	 * SVG elements in IE
	 */
	function removeClass(el, cls) {
		/* istanbul ignore if */
		if (!cls || !(cls = cls.trim())) {
			return
		}

		/* istanbul ignore else */
		if (el.classList) {
			if (cls.indexOf(' ') > -1) {
				cls.split(/\s+/).forEach(function (c) {
					return el.classList.remove(c)
				})
			} else {
				el.classList.remove(cls)
			}
			if (!el.classList.length) {
				el.removeAttribute('class')
			}
		} else {
			var cur = ' ' + (el.getAttribute('class') || '') + ' '
			var tar = ' ' + cls + ' '
			while (cur.indexOf(tar) >= 0) {
				cur = cur.replace(tar, ' ')
			}
			cur = cur.trim()
			if (cur) {
				el.setAttribute('class', cur)
			} else {
				el.removeAttribute('class')
			}
		}
	}

	/*  */

	function resolveTransition(def) {
		if (!def) {
			return
		}
		/* istanbul ignore else */
		if (typeof def === 'object') {
			var res = {}
			if (def.css !== false) {
				extend(res, autoCssTransition(def.name || 'v'))
			}
			extend(res, def)
			return res
		} else if (typeof def === 'string') {
			return autoCssTransition(def)
		}
	}

	var autoCssTransition = cached(function (name) {
		return {
			enterClass: name + '-enter',
			enterToClass: name + '-enter-to',
			enterActiveClass: name + '-enter-active',
			leaveClass: name + '-leave',
			leaveToClass: name + '-leave-to',
			leaveActiveClass: name + '-leave-active',
		}
	})

	var hasTransition = inBrowser && !isIE9
	var TRANSITION = 'transition'
	var ANIMATION = 'animation'

	// Transition property/event sniffing
	var transitionProp = 'transition'
	var transitionEndEvent = 'transitionend'
	var animationProp = 'animation'
	var animationEndEvent = 'animationend'
	if (hasTransition) {
		/* istanbul ignore if */
		if (window.ontransitionend === undefined && window.onwebkittransitionend !== undefined) {
			transitionProp = 'WebkitTransition'
			transitionEndEvent = 'webkitTransitionEnd'
		}
		if (window.onanimationend === undefined && window.onwebkitanimationend !== undefined) {
			animationProp = 'WebkitAnimation'
			animationEndEvent = 'webkitAnimationEnd'
		}
	}

	// binding to window is necessary to make hot reload work in IE in strict mode
	var raf = inBrowser
		? window.requestAnimationFrame
			? window.requestAnimationFrame.bind(window)
			: setTimeout
		: /* istanbul ignore next */ function (fn) {
				return fn()
		  }

	function nextFrame(fn) {
		raf(function () {
			raf(fn)
		})
	}

	function addTransitionClass(el, cls) {
		var transitionClasses = el._transitionClasses || (el._transitionClasses = [])
		if (transitionClasses.indexOf(cls) < 0) {
			transitionClasses.push(cls)
			addClass(el, cls)
		}
	}

	function removeTransitionClass(el, cls) {
		if (el._transitionClasses) {
			remove(el._transitionClasses, cls)
		}
		removeClass(el, cls)
	}

	function whenTransitionEnds(el, expectedType, cb) {
		var ref = getTransitionInfo(el, expectedType)
		var type = ref.type
		var timeout = ref.timeout
		var propCount = ref.propCount
		if (!type) {
			return cb()
		}
		var event = type === TRANSITION ? transitionEndEvent : animationEndEvent
		var ended = 0
		var end = function () {
			el.removeEventListener(event, onEnd)
			cb()
		}
		var onEnd = function (e) {
			if (e.target === el) {
				if (++ended >= propCount) {
					end()
				}
			}
		}
		setTimeout(function () {
			if (ended < propCount) {
				end()
			}
		}, timeout + 1)
		el.addEventListener(event, onEnd)
	}

	var transformRE = /\b(transform|all)(,|$)/

	function getTransitionInfo(el, expectedType) {
		var styles = window.getComputedStyle(el)
		var transitionDelays = styles[transitionProp + 'Delay'].split(', ')
		var transitionDurations = styles[transitionProp + 'Duration'].split(', ')
		var transitionTimeout = getTimeout(transitionDelays, transitionDurations)
		var animationDelays = styles[animationProp + 'Delay'].split(', ')
		var animationDurations = styles[animationProp + 'Duration'].split(', ')
		var animationTimeout = getTimeout(animationDelays, animationDurations)

		var type
		var timeout = 0
		var propCount = 0
		/* istanbul ignore if */
		if (expectedType === TRANSITION) {
			if (transitionTimeout > 0) {
				type = TRANSITION
				timeout = transitionTimeout
				propCount = transitionDurations.length
			}
		} else if (expectedType === ANIMATION) {
			if (animationTimeout > 0) {
				type = ANIMATION
				timeout = animationTimeout
				propCount = animationDurations.length
			}
		} else {
			timeout = Math.max(transitionTimeout, animationTimeout)
			type = timeout > 0 ? (transitionTimeout > animationTimeout ? TRANSITION : ANIMATION) : null
			propCount = type ? (type === TRANSITION ? transitionDurations.length : animationDurations.length) : 0
		}
		var hasTransform = type === TRANSITION && transformRE.test(styles[transitionProp + 'Property'])
		return {
			type: type,
			timeout: timeout,
			propCount: propCount,
			hasTransform: hasTransform,
		}
	}

	function getTimeout(delays, durations) {
		/* istanbul ignore next */
		while (delays.length < durations.length) {
			delays = delays.concat(delays)
		}

		return Math.max.apply(
			null,
			durations.map(function (d, i) {
				return toMs(d) + toMs(delays[i])
			})
		)
	}

	function toMs(s) {
		return Number(s.slice(0, -1)) * 1000
	}

	/*  */

	function enter(vnode, toggleDisplay) {
		var el = vnode.elm

		// call leave callback now
		if (isDef(el._leaveCb)) {
			el._leaveCb.cancelled = true
			el._leaveCb()
		}

		var data = resolveTransition(vnode.data.transition)
		if (isUndef(data)) {
			return
		}

		/* istanbul ignore if */
		if (isDef(el._enterCb) || el.nodeType !== 1) {
			return
		}

		var css = data.css
		var type = data.type
		var enterClass = data.enterClass
		var enterToClass = data.enterToClass
		var enterActiveClass = data.enterActiveClass
		var appearClass = data.appearClass
		var appearToClass = data.appearToClass
		var appearActiveClass = data.appearActiveClass
		var beforeEnter = data.beforeEnter
		var enter = data.enter
		var afterEnter = data.afterEnter
		var enterCancelled = data.enterCancelled
		var beforeAppear = data.beforeAppear
		var appear = data.appear
		var afterAppear = data.afterAppear
		var appearCancelled = data.appearCancelled
		var duration = data.duration

		// activeInstance will always be the <transition> component managing this
		// transition. One edge case to check is when the <transition> is placed
		// as the root node of a child component. In that case we need to check
		// <transition>'s parent for appear check.
		var context = activeInstance
		var transitionNode = activeInstance.$vnode
		while (transitionNode && transitionNode.parent) {
			transitionNode = transitionNode.parent
			context = transitionNode.context
		}

		var isAppear = !context._isMounted || !vnode.isRootInsert

		if (isAppear && !appear && appear !== '') {
			return
		}

		var startClass = isAppear && appearClass ? appearClass : enterClass
		var activeClass = isAppear && appearActiveClass ? appearActiveClass : enterActiveClass
		var toClass = isAppear && appearToClass ? appearToClass : enterToClass

		var beforeEnterHook = isAppear ? beforeAppear || beforeEnter : beforeEnter
		var enterHook = isAppear ? (typeof appear === 'function' ? appear : enter) : enter
		var afterEnterHook = isAppear ? afterAppear || afterEnter : afterEnter
		var enterCancelledHook = isAppear ? appearCancelled || enterCancelled : enterCancelled

		var explicitEnterDuration = toNumber(isObject(duration) ? duration.enter : duration)

		if ('development' !== 'production' && explicitEnterDuration != null) {
			checkDuration(explicitEnterDuration, 'enter', vnode)
		}

		var expectsCSS = css !== false && !isIE9
		var userWantsControl = getHookArgumentsLength(enterHook)

		var cb = (el._enterCb = once(function () {
			if (expectsCSS) {
				removeTransitionClass(el, toClass)
				removeTransitionClass(el, activeClass)
			}
			if (cb.cancelled) {
				if (expectsCSS) {
					removeTransitionClass(el, startClass)
				}
				enterCancelledHook && enterCancelledHook(el)
			} else {
				afterEnterHook && afterEnterHook(el)
			}
			el._enterCb = null
		}))

		if (!vnode.data.show) {
			// remove pending leave element on enter by injecting an insert hook
			mergeVNodeHook(vnode, 'insert', function () {
				var parent = el.parentNode
				var pendingNode = parent && parent._pending && parent._pending[vnode.key]
				if (pendingNode && pendingNode.tag === vnode.tag && pendingNode.elm._leaveCb) {
					pendingNode.elm._leaveCb()
				}
				enterHook && enterHook(el, cb)
			})
		}

		// start enter transition
		beforeEnterHook && beforeEnterHook(el)
		if (expectsCSS) {
			addTransitionClass(el, startClass)
			addTransitionClass(el, activeClass)
			nextFrame(function () {
				removeTransitionClass(el, startClass)
				if (!cb.cancelled) {
					addTransitionClass(el, toClass)
					if (!userWantsControl) {
						if (isValidDuration(explicitEnterDuration)) {
							setTimeout(cb, explicitEnterDuration)
						} else {
							whenTransitionEnds(el, type, cb)
						}
					}
				}
			})
		}

		if (vnode.data.show) {
			toggleDisplay && toggleDisplay()
			enterHook && enterHook(el, cb)
		}

		if (!expectsCSS && !userWantsControl) {
			cb()
		}
	}

	function leave(vnode, rm) {
		var el = vnode.elm

		// call enter callback now
		if (isDef(el._enterCb)) {
			el._enterCb.cancelled = true
			el._enterCb()
		}

		var data = resolveTransition(vnode.data.transition)
		if (isUndef(data) || el.nodeType !== 1) {
			return rm()
		}

		/* istanbul ignore if */
		if (isDef(el._leaveCb)) {
			return
		}

		var css = data.css
		var type = data.type
		var leaveClass = data.leaveClass
		var leaveToClass = data.leaveToClass
		var leaveActiveClass = data.leaveActiveClass
		var beforeLeave = data.beforeLeave
		var leave = data.leave
		var afterLeave = data.afterLeave
		var leaveCancelled = data.leaveCancelled
		var delayLeave = data.delayLeave
		var duration = data.duration

		var expectsCSS = css !== false && !isIE9
		var userWantsControl = getHookArgumentsLength(leave)

		var explicitLeaveDuration = toNumber(isObject(duration) ? duration.leave : duration)

		if ('development' !== 'production' && isDef(explicitLeaveDuration)) {
			checkDuration(explicitLeaveDuration, 'leave', vnode)
		}

		var cb = (el._leaveCb = once(function () {
			if (el.parentNode && el.parentNode._pending) {
				el.parentNode._pending[vnode.key] = null
			}
			if (expectsCSS) {
				removeTransitionClass(el, leaveToClass)
				removeTransitionClass(el, leaveActiveClass)
			}
			if (cb.cancelled) {
				if (expectsCSS) {
					removeTransitionClass(el, leaveClass)
				}
				leaveCancelled && leaveCancelled(el)
			} else {
				rm()
				afterLeave && afterLeave(el)
			}
			el._leaveCb = null
		}))

		if (delayLeave) {
			delayLeave(performLeave)
		} else {
			performLeave()
		}

		function performLeave() {
			// the delayed leave may have already been cancelled
			if (cb.cancelled) {
				return
			}
			// record leaving element
			if (!vnode.data.show) {
				;(el.parentNode._pending || (el.parentNode._pending = {}))[vnode.key] = vnode
			}
			beforeLeave && beforeLeave(el)
			if (expectsCSS) {
				addTransitionClass(el, leaveClass)
				addTransitionClass(el, leaveActiveClass)
				nextFrame(function () {
					removeTransitionClass(el, leaveClass)
					if (!cb.cancelled) {
						addTransitionClass(el, leaveToClass)
						if (!userWantsControl) {
							if (isValidDuration(explicitLeaveDuration)) {
								setTimeout(cb, explicitLeaveDuration)
							} else {
								whenTransitionEnds(el, type, cb)
							}
						}
					}
				})
			}
			leave && leave(el, cb)
			if (!expectsCSS && !userWantsControl) {
				cb()
			}
		}
	}

	// only used in dev mode
	function checkDuration(val, name, vnode) {
		if (typeof val !== 'number') {
			warn('<transition> explicit ' + name + ' duration is not a valid number - ' + 'got ' + JSON.stringify(val) + '.', vnode.context)
		} else if (isNaN(val)) {
			warn('<transition> explicit ' + name + ' duration is NaN - ' + 'the duration expression might be incorrect.', vnode.context)
		}
	}

	function isValidDuration(val) {
		return typeof val === 'number' && !isNaN(val)
	}

	/**
	 * Normalize a transition hook's argument length. The hook may be:
	 * - a merged hook (invoker) with the original in .fns
	 * - a wrapped component method (check ._length)
	 * - a plain function (.length)
	 */
	function getHookArgumentsLength(fn) {
		if (isUndef(fn)) {
			return false
		}
		var invokerFns = fn.fns
		if (isDef(invokerFns)) {
			// invoker
			return getHookArgumentsLength(Array.isArray(invokerFns) ? invokerFns[0] : invokerFns)
		} else {
			return (fn._length || fn.length) > 1
		}
	}

	function _enter(_, vnode) {
		if (vnode.data.show !== true) {
			enter(vnode)
		}
	}

	var transition = inBrowser
		? {
				create: _enter,
				activate: _enter,
				remove: function remove$$1(vnode, rm) {
					/* istanbul ignore else */
					if (vnode.data.show !== true) {
						leave(vnode, rm)
					} else {
						rm()
					}
				},
		  }
		: {}

	var platformModules = [attrs, klass, events, domProps, style, transition]

	/*  */

	// the directive module should be applied last, after all
	// built-in modules have been applied.
	var modules = platformModules.concat(baseModules)

	var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules })

	/**
	 * Not type checking this file because flow doesn't like attaching
	 * properties to Elements.
	 */

	/* istanbul ignore if */
	if (isIE9) {
		// http://www.matts411.com/post/internet-explorer-9-oninput/
		document.addEventListener('selectionchange', function () {
			var el = document.activeElement
			if (el && el.vmodel) {
				trigger(el, 'input')
			}
		})
	}

	var directive = {
		inserted: function inserted(el, binding, vnode, oldVnode) {
			if (vnode.tag === 'select') {
				// #6903
				if (oldVnode.elm && !oldVnode.elm._vOptions) {
					mergeVNodeHook(vnode, 'postpatch', function () {
						directive.componentUpdated(el, binding, vnode)
					})
				} else {
					setSelected(el, binding, vnode.context)
				}
				el._vOptions = [].map.call(el.options, getValue)
			} else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
				el._vModifiers = binding.modifiers
				if (!binding.modifiers.lazy) {
					el.addEventListener('compositionstart', onCompositionStart)
					el.addEventListener('compositionend', onCompositionEnd)
					// Safari < 10.2 & UIWebView doesn't fire compositionend when
					// switching focus before confirming composition choice
					// this also fixes the issue where some browsers e.g. iOS Chrome
					// fires "change" instead of "input" on autocomplete.
					el.addEventListener('change', onCompositionEnd)
					/* istanbul ignore if */
					if (isIE9) {
						el.vmodel = true
					}
				}
			}
		},

		componentUpdated: function componentUpdated(el, binding, vnode) {
			if (vnode.tag === 'select') {
				setSelected(el, binding, vnode.context)
				// in case the options rendered by v-for have changed,
				// it's possible that the value is out-of-sync with the rendered options.
				// detect such cases and filter out values that no longer has a matching
				// option in the DOM.
				var prevOptions = el._vOptions
				var curOptions = (el._vOptions = [].map.call(el.options, getValue))
				if (
					curOptions.some(function (o, i) {
						return !looseEqual(o, prevOptions[i])
					})
				) {
					// trigger change event if
					// no matching option found for at least one value
					var needReset = el.multiple
						? binding.value.some(function (v) {
								return hasNoMatchingOption(v, curOptions)
						  })
						: binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions)
					if (needReset) {
						trigger(el, 'change')
					}
				}
			}
		},
	}

	function setSelected(el, binding, vm) {
		actuallySetSelected(el, binding, vm)
		/* istanbul ignore if */
		if (isIE || isEdge) {
			setTimeout(function () {
				actuallySetSelected(el, binding, vm)
			}, 0)
		}
	}

	function actuallySetSelected(el, binding, vm) {
		var value = binding.value
		var isMultiple = el.multiple
		if (isMultiple && !Array.isArray(value)) {
			'development' !== 'production' &&
				warn(
					'<select multiple v-model="' +
						binding.expression +
						'"> ' +
						'expects an Array value for its binding, but got ' +
						Object.prototype.toString.call(value).slice(8, -1),
					vm
				)
			return
		}
		var selected, option
		for (var i = 0, l = el.options.length; i < l; i++) {
			option = el.options[i]
			if (isMultiple) {
				selected = looseIndexOf(value, getValue(option)) > -1
				if (option.selected !== selected) {
					option.selected = selected
				}
			} else {
				if (looseEqual(getValue(option), value)) {
					if (el.selectedIndex !== i) {
						el.selectedIndex = i
					}
					return
				}
			}
		}
		if (!isMultiple) {
			el.selectedIndex = -1
		}
	}

	function hasNoMatchingOption(value, options) {
		return options.every(function (o) {
			return !looseEqual(o, value)
		})
	}

	function getValue(option) {
		return '_value' in option ? option._value : option.value
	}

	function onCompositionStart(e) {
		e.target.composing = true
	}

	function onCompositionEnd(e) {
		// prevent triggering an input event for no reason
		if (!e.target.composing) {
			return
		}
		e.target.composing = false
		trigger(e.target, 'input')
	}

	function trigger(el, type) {
		var e = document.createEvent('HTMLEvents')
		e.initEvent(type, true, true)
		el.dispatchEvent(e)
	}

	/*  */

	// recursively search for possible transition defined inside the component root
	function locateNode(vnode) {
		return vnode.componentInstance && (!vnode.data || !vnode.data.transition) ? locateNode(vnode.componentInstance._vnode) : vnode
	}

	var show = {
		bind: function bind(el, ref, vnode) {
			var value = ref.value

			vnode = locateNode(vnode)
			var transition$$1 = vnode.data && vnode.data.transition
			var originalDisplay = (el.__vOriginalDisplay = el.style.display === 'none' ? '' : el.style.display)
			if (value && transition$$1) {
				vnode.data.show = true
				enter(vnode, function () {
					el.style.display = originalDisplay
				})
			} else {
				el.style.display = value ? originalDisplay : 'none'
			}
		},

		update: function update(el, ref, vnode) {
			var value = ref.value
			var oldValue = ref.oldValue

			/* istanbul ignore if */
			if (!value === !oldValue) {
				return
			}
			vnode = locateNode(vnode)
			var transition$$1 = vnode.data && vnode.data.transition
			if (transition$$1) {
				vnode.data.show = true
				if (value) {
					enter(vnode, function () {
						el.style.display = el.__vOriginalDisplay
					})
				} else {
					leave(vnode, function () {
						el.style.display = 'none'
					})
				}
			} else {
				el.style.display = value ? el.__vOriginalDisplay : 'none'
			}
		},

		unbind: function unbind(el, binding, vnode, oldVnode, isDestroy) {
			if (!isDestroy) {
				el.style.display = el.__vOriginalDisplay
			}
		},
	}

	var platformDirectives = {
		model: directive,
		show: show,
	}

	/*  */

	// Provides transition support for a single element/component.
	// supports transition mode (out-in / in-out)

	var transitionProps = {
		name: String,
		appear: Boolean,
		css: Boolean,
		mode: String,
		type: String,
		enterClass: String,
		leaveClass: String,
		enterToClass: String,
		leaveToClass: String,
		enterActiveClass: String,
		leaveActiveClass: String,
		appearClass: String,
		appearActiveClass: String,
		appearToClass: String,
		duration: [Number, String, Object],
	}

	// in case the child is also an abstract component, e.g. <keep-alive>
	// we want to recursively retrieve the real component to be rendered
	function getRealChild(vnode) {
		var compOptions = vnode && vnode.componentOptions
		if (compOptions && compOptions.Ctor.options.abstract) {
			return getRealChild(getFirstComponentChild(compOptions.children))
		} else {
			return vnode
		}
	}

	function extractTransitionData(comp) {
		var data = {}
		var options = comp.$options
		// props
		for (var key in options.propsData) {
			data[key] = comp[key]
		}
		// events.
		// extract listeners and pass them directly to the transition methods
		var listeners = options._parentListeners
		for (var key$1 in listeners) {
			data[camelize(key$1)] = listeners[key$1]
		}
		return data
	}

	function placeholder(h, rawChild) {
		if (/\d-keep-alive$/.test(rawChild.tag)) {
			return h('keep-alive', {
				props: rawChild.componentOptions.propsData,
			})
		}
	}

	function hasParentTransition(vnode) {
		while ((vnode = vnode.parent)) {
			if (vnode.data.transition) {
				return true
			}
		}
	}

	function isSameChild(child, oldChild) {
		return oldChild.key === child.key && oldChild.tag === child.tag
	}

	var Transition = {
		name: 'transition',
		props: transitionProps,
		abstract: true,

		render: function render(h) {
			var this$1 = this

			var children = this.$slots.default
			if (!children) {
				return
			}

			// filter out text nodes (possible whitespaces)
			children = children.filter(function (c) {
				return c.tag || isAsyncPlaceholder(c)
			})
			/* istanbul ignore if */
			if (!children.length) {
				return
			}

			// warn multiple elements
			if ('development' !== 'production' && children.length > 1) {
				warn('<transition> can only be used on a single element. Use ' + '<transition-group> for lists.', this.$parent)
			}

			var mode = this.mode

			// warn invalid mode
			if ('development' !== 'production' && mode && mode !== 'in-out' && mode !== 'out-in') {
				warn('invalid <transition> mode: ' + mode, this.$parent)
			}

			var rawChild = children[0]

			// if this is a component root node and the component's
			// parent container node also has transition, skip.
			if (hasParentTransition(this.$vnode)) {
				return rawChild
			}

			// apply transition data to child
			// use getRealChild() to ignore abstract components e.g. keep-alive
			var child = getRealChild(rawChild)
			/* istanbul ignore if */
			if (!child) {
				return rawChild
			}

			if (this._leaving) {
				return placeholder(h, rawChild)
			}

			// ensure a key that is unique to the vnode type and to this transition
			// component instance. This key will be used to remove pending leaving nodes
			// during entering.
			var id = '__transition-' + this._uid + '-'
			child.key =
				child.key == null
					? child.isComment
						? id + 'comment'
						: id + child.tag
					: isPrimitive(child.key)
					? String(child.key).indexOf(id) === 0
						? child.key
						: id + child.key
					: child.key

			var data = ((child.data || (child.data = {})).transition = extractTransitionData(this))
			var oldRawChild = this._vnode
			var oldChild = getRealChild(oldRawChild)

			// mark v-show
			// so that the transition module can hand over the control to the directive
			if (
				child.data.directives &&
				child.data.directives.some(function (d) {
					return d.name === 'show'
				})
			) {
				child.data.show = true
			}

			if (
				oldChild &&
				oldChild.data &&
				!isSameChild(child, oldChild) &&
				!isAsyncPlaceholder(oldChild) &&
				// #6687 component root is a comment node
				!(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
			) {
				// replace old child transition data with fresh one
				// important for dynamic transitions!
				var oldData = (oldChild.data.transition = extend({}, data))
				// handle transition mode
				if (mode === 'out-in') {
					// return placeholder node and queue update when leave finishes
					this._leaving = true
					mergeVNodeHook(oldData, 'afterLeave', function () {
						this$1._leaving = false
						this$1.$forceUpdate()
					})
					return placeholder(h, rawChild)
				} else if (mode === 'in-out') {
					if (isAsyncPlaceholder(child)) {
						return oldRawChild
					}
					var delayedLeave
					var performLeave = function () {
						delayedLeave()
					}
					mergeVNodeHook(data, 'afterEnter', performLeave)
					mergeVNodeHook(data, 'enterCancelled', performLeave)
					mergeVNodeHook(oldData, 'delayLeave', function (leave) {
						delayedLeave = leave
					})
				}
			}

			return rawChild
		},
	}

	/*  */

	// Provides transition support for list items.
	// supports move transitions using the FLIP technique.

	// Because the vdom's children update algorithm is "unstable" - i.e.
	// it doesn't guarantee the relative positioning of removed elements,
	// we force transition-group to update its children into two passes:
	// in the first pass, we remove all nodes that need to be removed,
	// triggering their leaving transition; in the second pass, we insert/move
	// into the final desired state. This way in the second pass removed
	// nodes will remain where they should be.

	var props = extend(
		{
			tag: String,
			moveClass: String,
		},
		transitionProps
	)

	delete props.mode

	var TransitionGroup = {
		props: props,

		render: function render(h) {
			var tag = this.tag || this.$vnode.data.tag || 'span'
			var map = Object.create(null)
			var prevChildren = (this.prevChildren = this.children)
			var rawChildren = this.$slots.default || []
			var children = (this.children = [])
			var transitionData = extractTransitionData(this)

			for (var i = 0; i < rawChildren.length; i++) {
				var c = rawChildren[i]
				if (c.tag) {
					if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
						children.push(c)
						map[c.key] = c
						;(c.data || (c.data = {})).transition = transitionData
					} else {
						var opts = c.componentOptions
						var name = opts ? opts.Ctor.options.name || opts.tag || '' : c.tag
						warn('<transition-group> children must be keyed: <' + name + '>')
					}
				}
			}

			if (prevChildren) {
				var kept = []
				var removed = []
				for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
					var c$1 = prevChildren[i$1]
					c$1.data.transition = transitionData
					c$1.data.pos = c$1.elm.getBoundingClientRect()
					if (map[c$1.key]) {
						kept.push(c$1)
					} else {
						removed.push(c$1)
					}
				}
				this.kept = h(tag, null, kept)
				this.removed = removed
			}

			return h(tag, null, children)
		},

		beforeUpdate: function beforeUpdate() {
			// force removing pass
			this.__patch__(
				this._vnode,
				this.kept,
				false, // hydrating
				true // removeOnly (!important, avoids unnecessary moves)
			)
			this._vnode = this.kept
		},

		updated: function updated() {
			var children = this.prevChildren
			var moveClass = this.moveClass || (this.name || 'v') + '-move'
			if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
				return
			}

			// we divide the work into three loops to avoid mixing DOM reads and writes
			// in each iteration - which helps prevent layout thrashing.
			children.forEach(callPendingCbs)
			children.forEach(recordPosition)
			children.forEach(applyTranslation)

			// force reflow to put everything in position
			// assign to this to avoid being removed in tree-shaking
			// $flow-disable-line
			this._reflow = document.body.offsetHeight

			children.forEach(function (c) {
				if (c.data.moved) {
					var el = c.elm
					var s = el.style
					addTransitionClass(el, moveClass)
					s.transform = s.WebkitTransform = s.transitionDuration = ''
					el.addEventListener(
						transitionEndEvent,
						(el._moveCb = function cb(e) {
							if (!e || /transform$/.test(e.propertyName)) {
								el.removeEventListener(transitionEndEvent, cb)
								el._moveCb = null
								removeTransitionClass(el, moveClass)
							}
						})
					)
				}
			})
		},

		methods: {
			hasMove: function hasMove(el, moveClass) {
				/* istanbul ignore if */
				if (!hasTransition) {
					return false
				}
				/* istanbul ignore if */
				if (this._hasMove) {
					return this._hasMove
				}
				// Detect whether an element with the move class applied has
				// CSS transitions. Since the element may be inside an entering
				// transition at this very moment, we make a clone of it and remove
				// all other transition classes applied to ensure only the move class
				// is applied.
				var clone = el.cloneNode()
				if (el._transitionClasses) {
					el._transitionClasses.forEach(function (cls) {
						removeClass(clone, cls)
					})
				}
				addClass(clone, moveClass)
				clone.style.display = 'none'
				this.$el.appendChild(clone)
				var info = getTransitionInfo(clone)
				this.$el.removeChild(clone)
				return (this._hasMove = info.hasTransform)
			},
		},
	}

	function callPendingCbs(c) {
		/* istanbul ignore if */
		if (c.elm._moveCb) {
			c.elm._moveCb()
		}
		/* istanbul ignore if */
		if (c.elm._enterCb) {
			c.elm._enterCb()
		}
	}

	function recordPosition(c) {
		c.data.newPos = c.elm.getBoundingClientRect()
	}

	function applyTranslation(c) {
		var oldPos = c.data.pos
		var newPos = c.data.newPos
		var dx = oldPos.left - newPos.left
		var dy = oldPos.top - newPos.top
		if (dx || dy) {
			c.data.moved = true
			var s = c.elm.style
			s.transform = s.WebkitTransform = 'translate(' + dx + 'px,' + dy + 'px)'
			s.transitionDuration = '0s'
		}
	}

	var platformComponents = {
		Transition: Transition,
		TransitionGroup: TransitionGroup,
	}

	/*  */

	// install platform specific utils
	Vue.config.mustUseProp = mustUseProp
	Vue.config.isReservedTag = isReservedTag
	Vue.config.isReservedAttr = isReservedAttr
	Vue.config.getTagNamespace = getTagNamespace
	Vue.config.isUnknownElement = isUnknownElement

	// install platform runtime directives & components
	extend(Vue.options.directives, platformDirectives)
	extend(Vue.options.components, platformComponents)

	// install platform patch function
	Vue.prototype.__patch__ = inBrowser ? patch : noop

	// public mount method
	Vue.prototype.$mount = function (el, hydrating) {
		el = el && inBrowser ? query(el) : undefined
		return mountComponent(this, el, hydrating)
	}

	// devtools global hook
	/* istanbul ignore next */
	if (inBrowser) {
		setTimeout(function () {
			if (config.devtools) {
				if (devtools) {
					devtools.emit('init', Vue)
				} else if ('development' !== 'production' && 'development' !== 'test' && isChrome) {
					console[console.info ? 'info' : 'log'](
						'Download the Vue Devtools extension for a better development experience:\n' + 'https://github.com/vuejs/vue-devtools'
					)
				}
			}
			if ('development' !== 'production' && 'development' !== 'test' && config.productionTip !== false && typeof console !== 'undefined') {
				console[console.info ? 'info' : 'log'](
					'You are running Vue in development mode.\n' +
						'Make sure to turn on production mode when deploying for production.\n' +
						'See more tips at https://vuejs.org/guide/deployment.html'
				)
			}
		}, 0)
	}

	/*  */

	var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g
	var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g

	var buildRegex = cached(function (delimiters) {
		var open = delimiters[0].replace(regexEscapeRE, '\\$&')
		var close = delimiters[1].replace(regexEscapeRE, '\\$&')
		return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
	})

	function parseText(text, delimiters) {
		var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE
		if (!tagRE.test(text)) {
			return
		}
		var tokens = []
		var rawTokens = []
		var lastIndex = (tagRE.lastIndex = 0)
		var match, index, tokenValue
		while ((match = tagRE.exec(text))) {
			index = match.index
			// push text token
			if (index > lastIndex) {
				rawTokens.push((tokenValue = text.slice(lastIndex, index)))
				tokens.push(JSON.stringify(tokenValue))
			}
			// tag token
			var exp = parseFilters(match[1].trim())
			tokens.push('_s(' + exp + ')')
			rawTokens.push({ '@binding': exp })
			lastIndex = index + match[0].length
		}
		if (lastIndex < text.length) {
			rawTokens.push((tokenValue = text.slice(lastIndex)))
			tokens.push(JSON.stringify(tokenValue))
		}
		return {
			expression: tokens.join('+'),
			tokens: rawTokens,
		}
	}

	/*  */

	function transformNode(el, options) {
		var warn = options.warn || baseWarn
		var staticClass = getAndRemoveAttr(el, 'class')
		if ('development' !== 'production' && staticClass) {
			var res = parseText(staticClass, options.delimiters)
			if (res) {
				warn(
					'class="' +
						staticClass +
						'": ' +
						'Interpolation inside attributes has been removed. ' +
						'Use v-bind or the colon shorthand instead. For example, ' +
						'instead of <div class="{{ val }}">, use <div :class="val">.'
				)
			}
		}
		if (staticClass) {
			el.staticClass = JSON.stringify(staticClass)
		}
		var classBinding = getBindingAttr(el, 'class', false /* getStatic */)
		if (classBinding) {
			el.classBinding = classBinding
		}
	}

	function genData(el) {
		var data = ''
		if (el.staticClass) {
			data += 'staticClass:' + el.staticClass + ','
		}
		if (el.classBinding) {
			data += 'class:' + el.classBinding + ','
		}
		return data
	}

	var klass$1 = {
		staticKeys: ['staticClass'],
		transformNode: transformNode,
		genData: genData,
	}

	/*  */

	function transformNode$1(el, options) {
		var warn = options.warn || baseWarn
		var staticStyle = getAndRemoveAttr(el, 'style')
		if (staticStyle) {
			/* istanbul ignore if */
			{
				var res = parseText(staticStyle, options.delimiters)
				if (res) {
					warn(
						'style="' +
							staticStyle +
							'": ' +
							'Interpolation inside attributes has been removed. ' +
							'Use v-bind or the colon shorthand instead. For example, ' +
							'instead of <div style="{{ val }}">, use <div :style="val">.'
					)
				}
			}
			el.staticStyle = JSON.stringify(parseStyleText(staticStyle))
		}

		var styleBinding = getBindingAttr(el, 'style', false /* getStatic */)
		if (styleBinding) {
			el.styleBinding = styleBinding
		}
	}

	function genData$1(el) {
		var data = ''
		if (el.staticStyle) {
			data += 'staticStyle:' + el.staticStyle + ','
		}
		if (el.styleBinding) {
			data += 'style:(' + el.styleBinding + '),'
		}
		return data
	}

	var style$1 = {
		staticKeys: ['staticStyle'],
		transformNode: transformNode$1,
		genData: genData$1,
	}

	/*  */

	var decoder

	var he = {
		decode: function decode(html) {
			decoder = decoder || document.createElement('div')
			decoder.innerHTML = html
			return decoder.textContent
		},
	}

	/*  */

	var isUnaryTag = makeMap('area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' + 'link,meta,param,source,track,wbr')

	// Elements that you can, intentionally, leave open
	// (and which close themselves)
	var canBeLeftOpenTag = makeMap('colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source')

	// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
	// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
	var isNonPhrasingTag = makeMap(
		'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
			'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
			'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
			'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
			'title,tr,track'
	)

	/**
	 * Not type-checking this file because it's mostly vendor code.
	 */

	/*!
	 * HTML Parser By John Resig (ejohn.org)
	 * Modified by Juriy "kangax" Zaytsev
	 * Original code by Erik Arvidsson, Mozilla Public License
	 * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
	 */

	// Regular Expressions for parsing tags and attributes
	var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/
	// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
	// but for Vue templates we can enforce a simple charset
	var ncname = '[a-zA-Z_][\\w\\-\\.]*'
	var qnameCapture = '((?:' + ncname + '\\:)?' + ncname + ')'
	var startTagOpen = new RegExp('^<' + qnameCapture)
	var startTagClose = /^\s*(\/?)>/
	var endTag = new RegExp('^<\\/' + qnameCapture + '[^>]*>')
	var doctype = /^<!DOCTYPE [^>]+>/i
	// #7298: escape - to avoid being pased as HTML comment when inlined in page
	var comment = /^<!\--/
	var conditionalComment = /^<!\[/

	var IS_REGEX_CAPTURING_BROKEN = false
	'x'.replace(/x(.)?/g, function (m, g) {
		IS_REGEX_CAPTURING_BROKEN = g === ''
	})

	// Special Elements (can contain anything)
	var isPlainTextElement = makeMap('script,style,textarea', true)
	var reCache = {}

	var decodingMap = {
		'&lt;': '<',
		'&gt;': '>',
		'&quot;': '"',
		'&amp;': '&',
		'&#10;': '\n',
		'&#9;': '\t',
	}
	var encodedAttr = /&(?:lt|gt|quot|amp);/g
	var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g

	// #5992
	var isIgnoreNewlineTag = makeMap('pre,textarea', true)
	var shouldIgnoreFirstNewline = function (tag, html) {
		return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'
	}

	function decodeAttr(value, shouldDecodeNewlines) {
		var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr
		return value.replace(re, function (match) {
			return decodingMap[match]
		})
	}

	function parseHTML(html, options) {
		var stack = []
		var expectHTML = options.expectHTML
		var isUnaryTag$$1 = options.isUnaryTag || no
		var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no
		var index = 0
		var last, lastTag
		while (html) {
			last = html
			// Make sure we're not in a plaintext content element like script/style
			if (!lastTag || !isPlainTextElement(lastTag)) {
				var textEnd = html.indexOf('<')
				if (textEnd === 0) {
					// Comment:
					if (comment.test(html)) {
						var commentEnd = html.indexOf('-->')

						if (commentEnd >= 0) {
							if (options.shouldKeepComment) {
								options.comment(html.substring(4, commentEnd))
							}
							advance(commentEnd + 3)
							continue
						}
					}

					// http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
					if (conditionalComment.test(html)) {
						var conditionalEnd = html.indexOf(']>')

						if (conditionalEnd >= 0) {
							advance(conditionalEnd + 2)
							continue
						}
					}

					// Doctype:
					var doctypeMatch = html.match(doctype)
					if (doctypeMatch) {
						advance(doctypeMatch[0].length)
						continue
					}

					// End tag:
					var endTagMatch = html.match(endTag)
					if (endTagMatch) {
						var curIndex = index
						advance(endTagMatch[0].length)
						parseEndTag(endTagMatch[1], curIndex, index)
						continue
					}

					// Start tag:
					var startTagMatch = parseStartTag()
					if (startTagMatch) {
						handleStartTag(startTagMatch)
						if (shouldIgnoreFirstNewline(lastTag, html)) {
							advance(1)
						}
						continue
					}
				}

				var text = void 0,
					rest = void 0,
					next = void 0
				if (textEnd >= 0) {
					rest = html.slice(textEnd)
					while (!endTag.test(rest) && !startTagOpen.test(rest) && !comment.test(rest) && !conditionalComment.test(rest)) {
						// < in plain text, be forgiving and treat it as text
						next = rest.indexOf('<', 1)
						if (next < 0) {
							break
						}
						textEnd += next
						rest = html.slice(textEnd)
					}
					text = html.substring(0, textEnd)
					advance(textEnd)
				}

				if (textEnd < 0) {
					text = html
					html = ''
				}

				if (options.chars && text) {
					options.chars(text)
				}
			} else {
				var endTagLength = 0
				var stackedTag = lastTag.toLowerCase()
				var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'))
				var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
					endTagLength = endTag.length
					if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
						text = text
							.replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
							.replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1')
					}
					if (shouldIgnoreFirstNewline(stackedTag, text)) {
						text = text.slice(1)
					}
					if (options.chars) {
						options.chars(text)
					}
					return ''
				})
				index += html.length - rest$1.length
				html = rest$1
				parseEndTag(stackedTag, index - endTagLength, index)
			}

			if (html === last) {
				options.chars && options.chars(html)
				if ('development' !== 'production' && !stack.length && options.warn) {
					options.warn('Mal-formatted tag at end of template: "' + html + '"')
				}
				break
			}
		}

		// Clean up any remaining tags
		parseEndTag()

		function advance(n) {
			index += n
			html = html.substring(n)
		}

		function parseStartTag() {
			var start = html.match(startTagOpen)
			if (start) {
				var match = {
					tagName: start[1],
					attrs: [],
					start: index,
				}
				advance(start[0].length)
				var end, attr
				while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
					advance(attr[0].length)
					match.attrs.push(attr)
				}
				if (end) {
					match.unarySlash = end[1]
					advance(end[0].length)
					match.end = index
					return match
				}
			}
		}

		function handleStartTag(match) {
			var tagName = match.tagName
			var unarySlash = match.unarySlash

			if (expectHTML) {
				if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
					parseEndTag(lastTag)
				}
				if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
					parseEndTag(tagName)
				}
			}

			var unary = isUnaryTag$$1(tagName) || !!unarySlash

			var l = match.attrs.length
			var attrs = new Array(l)
			for (var i = 0; i < l; i++) {
				var args = match.attrs[i]
				// hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
				if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
					if (args[3] === '') {
						delete args[3]
					}
					if (args[4] === '') {
						delete args[4]
					}
					if (args[5] === '') {
						delete args[5]
					}
				}
				var value = args[3] || args[4] || args[5] || ''
				var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href' ? options.shouldDecodeNewlinesForHref : options.shouldDecodeNewlines
				attrs[i] = {
					name: args[1],
					value: decodeAttr(value, shouldDecodeNewlines),
				}
			}

			if (!unary) {
				stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs })
				lastTag = tagName
			}

			if (options.start) {
				options.start(tagName, attrs, unary, match.start, match.end)
			}
		}

		function parseEndTag(tagName, start, end) {
			var pos, lowerCasedTagName
			if (start == null) {
				start = index
			}
			if (end == null) {
				end = index
			}

			if (tagName) {
				lowerCasedTagName = tagName.toLowerCase()
			}

			// Find the closest opened tag of the same type
			if (tagName) {
				for (pos = stack.length - 1; pos >= 0; pos--) {
					if (stack[pos].lowerCasedTag === lowerCasedTagName) {
						break
					}
				}
			} else {
				// If no tag name is provided, clean shop
				pos = 0
			}

			if (pos >= 0) {
				// Close all the open elements, up the stack
				for (var i = stack.length - 1; i >= pos; i--) {
					if ('development' !== 'production' && (i > pos || !tagName) && options.warn) {
						options.warn('tag <' + stack[i].tag + '> has no matching end tag.')
					}
					if (options.end) {
						options.end(stack[i].tag, start, end)
					}
				}

				// Remove the open elements from the stack
				stack.length = pos
				lastTag = pos && stack[pos - 1].tag
			} else if (lowerCasedTagName === 'br') {
				if (options.start) {
					options.start(tagName, [], true, start, end)
				}
			} else if (lowerCasedTagName === 'p') {
				if (options.start) {
					options.start(tagName, [], false, start, end)
				}
				if (options.end) {
					options.end(tagName, start, end)
				}
			}
		}
	}

	/*  */

	var onRE = /^@|^v-on:/
	var dirRE = /^v-|^@|^:/
	var forAliasRE = /([^]*?)\s+(?:in|of)\s+([^]*)/
	var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/
	var stripParensRE = /^\(|\)$/g

	var argRE = /:(.*)$/
	var bindRE = /^:|^v-bind:/
	var modifierRE = /\.[^.]+/g

	var decodeHTMLCached = cached(he.decode)

	// configurable state
	var warn$2
	var delimiters
	var transforms
	var preTransforms
	var postTransforms
	var platformIsPreTag
	var platformMustUseProp
	var platformGetTagNamespace

	function createASTElement(tag, attrs, parent) {
		return {
			type: 1,
			tag: tag,
			attrsList: attrs,
			attrsMap: makeAttrsMap(attrs),
			parent: parent,
			children: [],
		}
	}

	/**
	 * Convert HTML string to AST.
	 */
	function parse(template, options) {
		warn$2 = options.warn || baseWarn

		platformIsPreTag = options.isPreTag || no
		platformMustUseProp = options.mustUseProp || no
		platformGetTagNamespace = options.getTagNamespace || no

		transforms = pluckModuleFunction(options.modules, 'transformNode')
		preTransforms = pluckModuleFunction(options.modules, 'preTransformNode')
		postTransforms = pluckModuleFunction(options.modules, 'postTransformNode')

		delimiters = options.delimiters

		var stack = []
		var preserveWhitespace = options.preserveWhitespace !== false
		var root
		var currentParent
		var inVPre = false
		var inPre = false
		var warned = false

		function warnOnce(msg) {
			if (!warned) {
				warned = true
				warn$2(msg)
			}
		}

		function closeElement(element) {
			// check pre state
			if (element.pre) {
				inVPre = false
			}
			if (platformIsPreTag(element.tag)) {
				inPre = false
			}
			// apply post-transforms
			for (var i = 0; i < postTransforms.length; i++) {
				postTransforms[i](element, options)
			}
		}

		parseHTML(template, {
			warn: warn$2,
			expectHTML: options.expectHTML,
			isUnaryTag: options.isUnaryTag,
			canBeLeftOpenTag: options.canBeLeftOpenTag,
			shouldDecodeNewlines: options.shouldDecodeNewlines,
			shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
			shouldKeepComment: options.comments,
			start: function start(tag, attrs, unary) {
				// check namespace.
				// inherit parent ns if there is one
				var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag)

				// handle IE svg bug
				/* istanbul ignore if */
				if (isIE && ns === 'svg') {
					attrs = guardIESVGBug(attrs)
				}

				var element = createASTElement(tag, attrs, currentParent)
				if (ns) {
					element.ns = ns
				}

				if (isForbiddenTag(element) && !isServerRendering()) {
					element.forbidden = true
					'development' !== 'production' &&
						warn$2(
							'Templates should only be responsible for mapping the state to the ' +
								'UI. Avoid placing tags with side-effects in your templates, such as ' +
								'<' +
								tag +
								'>' +
								', as they will not be parsed.'
						)
				}

				// apply pre-transforms
				for (var i = 0; i < preTransforms.length; i++) {
					element = preTransforms[i](element, options) || element
				}

				if (!inVPre) {
					processPre(element)
					if (element.pre) {
						inVPre = true
					}
				}
				if (platformIsPreTag(element.tag)) {
					inPre = true
				}
				if (inVPre) {
					processRawAttrs(element)
				} else if (!element.processed) {
					// structural directives
					processFor(element)
					processIf(element)
					processOnce(element)
					// element-scope stuff
					processElement(element, options)
				}

				function checkRootConstraints(el) {
					{
						if (el.tag === 'slot' || el.tag === 'template') {
							warnOnce('Cannot use <' + el.tag + '> as component root element because it may ' + 'contain multiple nodes.')
						}
						if (el.attrsMap.hasOwnProperty('v-for')) {
							warnOnce('Cannot use v-for on stateful component root element because ' + 'it renders multiple elements.')
						}
					}
				}

				// tree management
				if (!root) {
					root = element
					checkRootConstraints(root)
				} else if (!stack.length) {
					// allow root elements with v-if, v-else-if and v-else
					if (root.if && (element.elseif || element.else)) {
						checkRootConstraints(element)
						addIfCondition(root, {
							exp: element.elseif,
							block: element,
						})
					} else {
						warnOnce(
							'Component template should contain exactly one root element. ' +
								'If you are using v-if on multiple elements, ' +
								'use v-else-if to chain them instead.'
						)
					}
				}
				if (currentParent && !element.forbidden) {
					if (element.elseif || element.else) {
						processIfConditions(element, currentParent)
					} else if (element.slotScope) {
						// scoped slot
						currentParent.plain = false
						var name = element.slotTarget || '"default"'
						;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element
					} else {
						currentParent.children.push(element)
						element.parent = currentParent
					}
				}
				if (!unary) {
					currentParent = element
					stack.push(element)
				} else {
					closeElement(element)
				}
			},

			end: function end() {
				// remove trailing whitespace
				var element = stack[stack.length - 1]
				var lastNode = element.children[element.children.length - 1]
				if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
					element.children.pop()
				}
				// pop stack
				stack.length -= 1
				currentParent = stack[stack.length - 1]
				closeElement(element)
			},

			chars: function chars(text) {
				if (!currentParent) {
					{
						if (text === template) {
							warnOnce('Component template requires a root element, rather than just text.')
						} else if ((text = text.trim())) {
							warnOnce('text "' + text + '" outside root element will be ignored.')
						}
					}
					return
				}
				// IE textarea placeholder bug
				/* istanbul ignore if */
				if (isIE && currentParent.tag === 'textarea' && currentParent.attrsMap.placeholder === text) {
					return
				}
				var children = currentParent.children
				text =
					inPre || text.trim()
						? isTextTag(currentParent)
							? text
							: decodeHTMLCached(text)
						: // only preserve whitespace if its not right after a starting tag
						preserveWhitespace && children.length
						? ' '
						: ''
				if (text) {
					var res
					if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
						children.push({
							type: 2,
							expression: res.expression,
							tokens: res.tokens,
							text: text,
						})
					} else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
						children.push({
							type: 3,
							text: text,
						})
					}
				}
			},
			comment: function comment(text) {
				currentParent.children.push({
					type: 3,
					text: text,
					isComment: true,
				})
			},
		})
		return root
	}

	function processPre(el) {
		if (getAndRemoveAttr(el, 'v-pre') != null) {
			el.pre = true
		}
	}

	function processRawAttrs(el) {
		var l = el.attrsList.length
		if (l) {
			var attrs = (el.attrs = new Array(l))
			for (var i = 0; i < l; i++) {
				attrs[i] = {
					name: el.attrsList[i].name,
					value: JSON.stringify(el.attrsList[i].value),
				}
			}
		} else if (!el.pre) {
			// non root node in pre blocks with no attributes
			el.plain = true
		}
	}

	function processElement(element, options) {
		processKey(element)

		// determine whether this is a plain element after
		// removing structural attributes
		element.plain = !element.key && !element.attrsList.length

		processRef(element)
		processSlot(element)
		processComponent(element)
		for (var i = 0; i < transforms.length; i++) {
			element = transforms[i](element, options) || element
		}
		processAttrs(element)
	}

	function processKey(el) {
		var exp = getBindingAttr(el, 'key')
		if (exp) {
			if ('development' !== 'production' && el.tag === 'template') {
				warn$2('<template> cannot be keyed. Place the key on real elements instead.')
			}
			el.key = exp
		}
	}

	function processRef(el) {
		var ref = getBindingAttr(el, 'ref')
		if (ref) {
			el.ref = ref
			el.refInFor = checkInFor(el)
		}
	}

	function processFor(el) {
		var exp
		if ((exp = getAndRemoveAttr(el, 'v-for'))) {
			var res = parseFor(exp)
			if (res) {
				extend(el, res)
			} else {
				warn$2('Invalid v-for expression: ' + exp)
			}
		}
	}

	function parseFor(exp) {
		var inMatch = exp.match(forAliasRE)
		if (!inMatch) {
			return
		}
		var res = {}
		res.for = inMatch[2].trim()
		var alias = inMatch[1].trim().replace(stripParensRE, '')
		var iteratorMatch = alias.match(forIteratorRE)
		if (iteratorMatch) {
			res.alias = alias.replace(forIteratorRE, '')
			res.iterator1 = iteratorMatch[1].trim()
			if (iteratorMatch[2]) {
				res.iterator2 = iteratorMatch[2].trim()
			}
		} else {
			res.alias = alias
		}
		return res
	}

	function processIf(el) {
		var exp = getAndRemoveAttr(el, 'v-if')
		if (exp) {
			el.if = exp
			addIfCondition(el, {
				exp: exp,
				block: el,
			})
		} else {
			if (getAndRemoveAttr(el, 'v-else') != null) {
				el.else = true
			}
			var elseif = getAndRemoveAttr(el, 'v-else-if')
			if (elseif) {
				el.elseif = elseif
			}
		}
	}

	function processIfConditions(el, parent) {
		var prev = findPrevElement(parent.children)
		if (prev && prev.if) {
			addIfCondition(prev, {
				exp: el.elseif,
				block: el,
			})
		} else {
			warn$2('v-' + (el.elseif ? 'else-if="' + el.elseif + '"' : 'else') + ' ' + 'used on element <' + el.tag + '> without corresponding v-if.')
		}
	}

	function findPrevElement(children) {
		var i = children.length
		while (i--) {
			if (children[i].type === 1) {
				return children[i]
			} else {
				if ('development' !== 'production' && children[i].text !== ' ') {
					warn$2('text "' + children[i].text.trim() + '" between v-if and v-else(-if) ' + 'will be ignored.')
				}
				children.pop()
			}
		}
	}

	function addIfCondition(el, condition) {
		if (!el.ifConditions) {
			el.ifConditions = []
		}
		el.ifConditions.push(condition)
	}

	function processOnce(el) {
		var once$$1 = getAndRemoveAttr(el, 'v-once')
		if (once$$1 != null) {
			el.once = true
		}
	}

	function processSlot(el) {
		if (el.tag === 'slot') {
			el.slotName = getBindingAttr(el, 'name')
			if ('development' !== 'production' && el.key) {
				warn$2(
					'`key` does not work on <slot> because slots are abstract outlets ' +
						'and can possibly expand into multiple elements. ' +
						'Use the key on a wrapping element instead.'
				)
			}
		} else {
			var slotScope
			if (el.tag === 'template') {
				slotScope = getAndRemoveAttr(el, 'scope')
				/* istanbul ignore if */
				if ('development' !== 'production' && slotScope) {
					warn$2(
						'the "scope" attribute for scoped slots have been deprecated and ' +
							'replaced by "slot-scope" since 2.5. The new "slot-scope" attribute ' +
							'can also be used on plain elements in addition to <template> to ' +
							'denote scoped slots.',
						true
					)
				}
				el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope')
			} else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
				/* istanbul ignore if */
				if ('development' !== 'production' && el.attrsMap['v-for']) {
					warn$2(
						'Ambiguous combined usage of slot-scope and v-for on <' +
							el.tag +
							'> ' +
							'(v-for takes higher priority). Use a wrapper <template> for the ' +
							'scoped slot to make it clearer.',
						true
					)
				}
				el.slotScope = slotScope
			}
			var slotTarget = getBindingAttr(el, 'slot')
			if (slotTarget) {
				el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget
				// preserve slot as an attribute for native shadow DOM compat
				// only for non-scoped slots.
				if (el.tag !== 'template' && !el.slotScope) {
					addAttr(el, 'slot', slotTarget)
				}
			}
		}
	}

	function processComponent(el) {
		var binding
		if ((binding = getBindingAttr(el, 'is'))) {
			el.component = binding
		}
		if (getAndRemoveAttr(el, 'inline-template') != null) {
			el.inlineTemplate = true
		}
	}

	function processAttrs(el) {
		var list = el.attrsList
		var i, l, name, rawName, value, modifiers, isProp
		for (i = 0, l = list.length; i < l; i++) {
			name = rawName = list[i].name
			value = list[i].value
			if (dirRE.test(name)) {
				// mark element as dynamic
				el.hasBindings = true
				// modifiers
				modifiers = parseModifiers(name)
				if (modifiers) {
					name = name.replace(modifierRE, '')
				}
				if (bindRE.test(name)) {
					// v-bind
					name = name.replace(bindRE, '')
					value = parseFilters(value)
					isProp = false
					if (modifiers) {
						if (modifiers.prop) {
							isProp = true
							name = camelize(name)
							if (name === 'innerHtml') {
								name = 'innerHTML'
							}
						}
						if (modifiers.camel) {
							name = camelize(name)
						}
						if (modifiers.sync) {
							addHandler(el, 'update:' + camelize(name), genAssignmentCode(value, '$event'))
						}
					}
					if (isProp || (!el.component && platformMustUseProp(el.tag, el.attrsMap.type, name))) {
						addProp(el, name, value)
					} else {
						addAttr(el, name, value)
					}
				} else if (onRE.test(name)) {
					// v-on
					name = name.replace(onRE, '')
					addHandler(el, name, value, modifiers, false, warn$2)
				} else {
					// normal directives
					name = name.replace(dirRE, '')
					// parse arg
					var argMatch = name.match(argRE)
					var arg = argMatch && argMatch[1]
					if (arg) {
						name = name.slice(0, -(arg.length + 1))
					}
					addDirective(el, name, rawName, value, arg, modifiers)
					if ('development' !== 'production' && name === 'model') {
						checkForAliasModel(el, value)
					}
				}
			} else {
				// literal attribute
				{
					var res = parseText(value, delimiters)
					if (res) {
						warn$2(
							name +
								'="' +
								value +
								'": ' +
								'Interpolation inside attributes has been removed. ' +
								'Use v-bind or the colon shorthand instead. For example, ' +
								'instead of <div id="{{ val }}">, use <div :id="val">.'
						)
					}
				}
				addAttr(el, name, JSON.stringify(value))
				// #6887 firefox doesn't update muted state if set via attribute
				// even immediately after element creation
				if (!el.component && name === 'muted' && platformMustUseProp(el.tag, el.attrsMap.type, name)) {
					addProp(el, name, 'true')
				}
			}
		}
	}

	function checkInFor(el) {
		var parent = el
		while (parent) {
			if (parent.for !== undefined) {
				return true
			}
			parent = parent.parent
		}
		return false
	}

	function parseModifiers(name) {
		var match = name.match(modifierRE)
		if (match) {
			var ret = {}
			match.forEach(function (m) {
				ret[m.slice(1)] = true
			})
			return ret
		}
	}

	function makeAttrsMap(attrs) {
		var map = {}
		for (var i = 0, l = attrs.length; i < l; i++) {
			if ('development' !== 'production' && map[attrs[i].name] && !isIE && !isEdge) {
				warn$2('duplicate attribute: ' + attrs[i].name)
			}
			map[attrs[i].name] = attrs[i].value
		}
		return map
	}

	// for script (e.g. type="x/template") or style, do not decode content
	function isTextTag(el) {
		return el.tag === 'script' || el.tag === 'style'
	}

	function isForbiddenTag(el) {
		return el.tag === 'style' || (el.tag === 'script' && (!el.attrsMap.type || el.attrsMap.type === 'text/javascript'))
	}

	var ieNSBug = /^xmlns:NS\d+/
	var ieNSPrefix = /^NS\d+:/

	/* istanbul ignore next */
	function guardIESVGBug(attrs) {
		var res = []
		for (var i = 0; i < attrs.length; i++) {
			var attr = attrs[i]
			if (!ieNSBug.test(attr.name)) {
				attr.name = attr.name.replace(ieNSPrefix, '')
				res.push(attr)
			}
		}
		return res
	}

	function checkForAliasModel(el, value) {
		var _el = el
		while (_el) {
			if (_el.for && _el.alias === value) {
				warn$2(
					'<' +
						el.tag +
						' v-model="' +
						value +
						'">: ' +
						'You are binding v-model directly to a v-for iteration alias. ' +
						'This will not be able to modify the v-for source array because ' +
						'writing to the alias is like modifying a function local variable. ' +
						'Consider using an array of objects and use v-model on an object property instead.'
				)
			}
			_el = _el.parent
		}
	}

	/*  */

	/**
	 * Expand input[v-model] with dyanmic type bindings into v-if-else chains
	 * Turn this:
	 *   <input v-model="data[type]" :type="type">
	 * into this:
	 *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
	 *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
	 *   <input v-else :type="type" v-model="data[type]">
	 */

	function preTransformNode(el, options) {
		if (el.tag === 'input') {
			var map = el.attrsMap
			if (!map['v-model']) {
				return
			}

			var typeBinding
			if (map[':type'] || map['v-bind:type']) {
				typeBinding = getBindingAttr(el, 'type')
			}
			if (!map.type && !typeBinding && map['v-bind']) {
				typeBinding = '(' + map['v-bind'] + ').type'
			}

			if (typeBinding) {
				var ifCondition = getAndRemoveAttr(el, 'v-if', true)
				var ifConditionExtra = ifCondition ? '&&(' + ifCondition + ')' : ''
				var hasElse = getAndRemoveAttr(el, 'v-else', true) != null
				var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true)
				// 1. checkbox
				var branch0 = cloneASTElement(el)
				// process for on the main node
				processFor(branch0)
				addRawAttr(branch0, 'type', 'checkbox')
				processElement(branch0, options)
				branch0.processed = true // prevent it from double-processed
				branch0.if = '(' + typeBinding + ")==='checkbox'" + ifConditionExtra
				addIfCondition(branch0, {
					exp: branch0.if,
					block: branch0,
				})
				// 2. add radio else-if condition
				var branch1 = cloneASTElement(el)
				getAndRemoveAttr(branch1, 'v-for', true)
				addRawAttr(branch1, 'type', 'radio')
				processElement(branch1, options)
				addIfCondition(branch0, {
					exp: '(' + typeBinding + ")==='radio'" + ifConditionExtra,
					block: branch1,
				})
				// 3. other
				var branch2 = cloneASTElement(el)
				getAndRemoveAttr(branch2, 'v-for', true)
				addRawAttr(branch2, ':type', typeBinding)
				processElement(branch2, options)
				addIfCondition(branch0, {
					exp: ifCondition,
					block: branch2,
				})

				if (hasElse) {
					branch0.else = true
				} else if (elseIfCondition) {
					branch0.elseif = elseIfCondition
				}

				return branch0
			}
		}
	}

	function cloneASTElement(el) {
		return createASTElement(el.tag, el.attrsList.slice(), el.parent)
	}

	var model$2 = {
		preTransformNode: preTransformNode,
	}

	var modules$1 = [klass$1, style$1, model$2]

	/*  */

	function text(el, dir) {
		if (dir.value) {
			addProp(el, 'textContent', '_s(' + dir.value + ')')
		}
	}

	/*  */

	function html(el, dir) {
		if (dir.value) {
			addProp(el, 'innerHTML', '_s(' + dir.value + ')')
		}
	}

	var directives$1 = {
		model: model,
		text: text,
		html: html,
	}

	/*  */

	var baseOptions = {
		expectHTML: true,
		modules: modules$1,
		directives: directives$1,
		isPreTag: isPreTag,
		isUnaryTag: isUnaryTag,
		mustUseProp: mustUseProp,
		canBeLeftOpenTag: canBeLeftOpenTag,
		isReservedTag: isReservedTag,
		getTagNamespace: getTagNamespace,
		staticKeys: genStaticKeys(modules$1),
	}

	/*  */

	var isStaticKey
	var isPlatformReservedTag

	var genStaticKeysCached = cached(genStaticKeys$1)

	/**
	 * Goal of the optimizer: walk the generated template AST tree
	 * and detect sub-trees that are purely static, i.e. parts of
	 * the DOM that never needs to change.
	 *
	 * Once we detect these sub-trees, we can:
	 *
	 * 1. Hoist them into constants, so that we no longer need to
	 *    create fresh nodes for them on each re-render;
	 * 2. Completely skip them in the patching process.
	 */
	function optimize(root, options) {
		if (!root) {
			return
		}
		isStaticKey = genStaticKeysCached(options.staticKeys || '')
		isPlatformReservedTag = options.isReservedTag || no
		// first pass: mark all non-static nodes.
		markStatic$1(root)
		// second pass: mark static roots.
		markStaticRoots(root, false)
	}

	function genStaticKeys$1(keys) {
		return makeMap('type,tag,attrsList,attrsMap,plain,parent,children,attrs' + (keys ? ',' + keys : ''))
	}

	function markStatic$1(node) {
		node.static = isStatic(node)
		if (node.type === 1) {
			// do not make component slot content static. this avoids
			// 1. components not able to mutate slot nodes
			// 2. static slot content fails for hot-reloading
			if (!isPlatformReservedTag(node.tag) && node.tag !== 'slot' && node.attrsMap['inline-template'] == null) {
				return
			}
			for (var i = 0, l = node.children.length; i < l; i++) {
				var child = node.children[i]
				markStatic$1(child)
				if (!child.static) {
					node.static = false
				}
			}
			if (node.ifConditions) {
				for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
					var block = node.ifConditions[i$1].block
					markStatic$1(block)
					if (!block.static) {
						node.static = false
					}
				}
			}
		}
	}

	function markStaticRoots(node, isInFor) {
		if (node.type === 1) {
			if (node.static || node.once) {
				node.staticInFor = isInFor
			}
			// For a node to qualify as a static root, it should have children that
			// are not just static text. Otherwise the cost of hoisting out will
			// outweigh the benefits and it's better off to just always render it fresh.
			if (node.static && node.children.length && !(node.children.length === 1 && node.children[0].type === 3)) {
				node.staticRoot = true
				return
			} else {
				node.staticRoot = false
			}
			if (node.children) {
				for (var i = 0, l = node.children.length; i < l; i++) {
					markStaticRoots(node.children[i], isInFor || !!node.for)
				}
			}
			if (node.ifConditions) {
				for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
					markStaticRoots(node.ifConditions[i$1].block, isInFor)
				}
			}
		}
	}

	function isStatic(node) {
		if (node.type === 2) {
			// expression
			return false
		}
		if (node.type === 3) {
			// text
			return true
		}
		return !!(
			node.pre ||
			(!node.hasBindings && // no dynamic bindings
				!node.if &&
				!node.for && // not v-if or v-for or v-else
				!isBuiltInTag(node.tag) && // not a built-in
				isPlatformReservedTag(node.tag) && // not a component
				!isDirectChildOfTemplateFor(node) &&
				Object.keys(node).every(isStaticKey))
		)
	}

	function isDirectChildOfTemplateFor(node) {
		while (node.parent) {
			node = node.parent
			if (node.tag !== 'template') {
				return false
			}
			if (node.for) {
				return true
			}
		}
		return false
	}

	/*  */

	var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/
	var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/

	// KeyboardEvent.keyCode aliases
	var keyCodes = {
		esc: 27,
		tab: 9,
		enter: 13,
		space: 32,
		up: 38,
		left: 37,
		right: 39,
		down: 40,
		delete: [8, 46],
	}

	// KeyboardEvent.key aliases
	var keyNames = {
		esc: 'Escape',
		tab: 'Tab',
		enter: 'Enter',
		space: ' ',
		// #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
		up: ['Up', 'ArrowUp'],
		left: ['Left', 'ArrowLeft'],
		right: ['Right', 'ArrowRight'],
		down: ['Down', 'ArrowDown'],
		delete: ['Backspace', 'Delete'],
	}

	// #4868: modifiers that prevent the execution of the listener
	// need to explicitly return null so that we can determine whether to remove
	// the listener for .once
	var genGuard = function (condition) {
		return 'if(' + condition + ')return null;'
	}

	var modifierCode = {
		stop: '$event.stopPropagation();',
		prevent: '$event.preventDefault();',
		self: genGuard('$event.target !== $event.currentTarget'),
		ctrl: genGuard('!$event.ctrlKey'),
		shift: genGuard('!$event.shiftKey'),
		alt: genGuard('!$event.altKey'),
		meta: genGuard('!$event.metaKey'),
		left: genGuard("'button' in $event && $event.button !== 0"),
		middle: genGuard("'button' in $event && $event.button !== 1"),
		right: genGuard("'button' in $event && $event.button !== 2"),
	}

	function genHandlers(events, isNative, warn) {
		var res = isNative ? 'nativeOn:{' : 'on:{'
		for (var name in events) {
			res += '"' + name + '":' + genHandler(name, events[name]) + ','
		}
		return res.slice(0, -1) + '}'
	}

	function genHandler(name, handler) {
		if (!handler) {
			return 'function(){}'
		}

		if (Array.isArray(handler)) {
			return (
				'[' +
				handler
					.map(function (handler) {
						return genHandler(name, handler)
					})
					.join(',') +
				']'
			)
		}

		var isMethodPath = simplePathRE.test(handler.value)
		var isFunctionExpression = fnExpRE.test(handler.value)

		if (!handler.modifiers) {
			if (isMethodPath || isFunctionExpression) {
				return handler.value
			}
			/* istanbul ignore if */
			return 'function($event){' + handler.value + '}' // inline statement
		} else {
			var code = ''
			var genModifierCode = ''
			var keys = []
			for (var key in handler.modifiers) {
				if (modifierCode[key]) {
					genModifierCode += modifierCode[key]
					// left/right
					if (keyCodes[key]) {
						keys.push(key)
					}
				} else if (key === 'exact') {
					var modifiers = handler.modifiers
					genModifierCode += genGuard(
						['ctrl', 'shift', 'alt', 'meta']
							.filter(function (keyModifier) {
								return !modifiers[keyModifier]
							})
							.map(function (keyModifier) {
								return '$event.' + keyModifier + 'Key'
							})
							.join('||')
					)
				} else {
					keys.push(key)
				}
			}
			if (keys.length) {
				code += genKeyFilter(keys)
			}
			// Make sure modifiers like prevent and stop get executed after key filtering
			if (genModifierCode) {
				code += genModifierCode
			}
			var handlerCode = isMethodPath
				? 'return ' + handler.value + '($event)'
				: isFunctionExpression
				? 'return (' + handler.value + ')($event)'
				: handler.value
			/* istanbul ignore if */
			return 'function($event){' + code + handlerCode + '}'
		}
	}

	function genKeyFilter(keys) {
		return "if(!('button' in $event)&&" + keys.map(genFilterCode).join('&&') + ')return null;'
	}

	function genFilterCode(key) {
		var keyVal = parseInt(key, 10)
		if (keyVal) {
			return '$event.keyCode!==' + keyVal
		}
		var keyCode = keyCodes[key]
		var keyName = keyNames[key]
		return '_k($event.keyCode,' + JSON.stringify(key) + ',' + JSON.stringify(keyCode) + ',' + '$event.key,' + '' + JSON.stringify(keyName) + ')'
	}

	/*  */

	function on(el, dir) {
		if ('development' !== 'production' && dir.modifiers) {
			warn('v-on without argument does not support modifiers.')
		}
		el.wrapListeners = function (code) {
			return '_g(' + code + ',' + dir.value + ')'
		}
	}

	/*  */

	function bind$1(el, dir) {
		el.wrapData = function (code) {
			return (
				'_b(' +
				code +
				",'" +
				el.tag +
				"'," +
				dir.value +
				',' +
				(dir.modifiers && dir.modifiers.prop ? 'true' : 'false') +
				(dir.modifiers && dir.modifiers.sync ? ',true' : '') +
				')'
			)
		}
	}

	/*  */

	var baseDirectives = {
		on: on,
		bind: bind$1,
		cloak: noop,
	}

	/*  */

	var CodegenState = function CodegenState(options) {
		this.options = options
		this.warn = options.warn || baseWarn
		this.transforms = pluckModuleFunction(options.modules, 'transformCode')
		this.dataGenFns = pluckModuleFunction(options.modules, 'genData')
		this.directives = extend(extend({}, baseDirectives), options.directives)
		var isReservedTag = options.isReservedTag || no
		this.maybeComponent = function (el) {
			return !isReservedTag(el.tag)
		}
		this.onceId = 0
		this.staticRenderFns = []
	}

	function generate(ast, options) {
		var state = new CodegenState(options)
		var code = ast ? genElement(ast, state) : '_c("div")'
		return {
			render: 'with(this){return ' + code + '}',
			staticRenderFns: state.staticRenderFns,
		}
	}

	function genElement(el, state) {
		if (el.staticRoot && !el.staticProcessed) {
			return genStatic(el, state)
		} else if (el.once && !el.onceProcessed) {
			return genOnce(el, state)
		} else if (el.for && !el.forProcessed) {
			return genFor(el, state)
		} else if (el.if && !el.ifProcessed) {
			return genIf(el, state)
		} else if (el.tag === 'template' && !el.slotTarget) {
			return genChildren(el, state) || 'void 0'
		} else if (el.tag === 'slot') {
			return genSlot(el, state)
		} else {
			// component or element
			var code
			if (el.component) {
				code = genComponent(el.component, el, state)
			} else {
				var data = el.plain ? undefined : genData$2(el, state)

				var children = el.inlineTemplate ? null : genChildren(el, state, true)
				code = "_c('" + el.tag + "'" + (data ? ',' + data : '') + (children ? ',' + children : '') + ')'
			}
			// module transforms
			for (var i = 0; i < state.transforms.length; i++) {
				code = state.transforms[i](el, code)
			}
			return code
		}
	}

	// hoist static sub-trees out
	function genStatic(el, state) {
		el.staticProcessed = true
		state.staticRenderFns.push('with(this){return ' + genElement(el, state) + '}')
		return '_m(' + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ')'
	}

	// v-once
	function genOnce(el, state) {
		el.onceProcessed = true
		if (el.if && !el.ifProcessed) {
			return genIf(el, state)
		} else if (el.staticInFor) {
			var key = ''
			var parent = el.parent
			while (parent) {
				if (parent.for) {
					key = parent.key
					break
				}
				parent = parent.parent
			}
			if (!key) {
				'development' !== 'production' && state.warn('v-once can only be used inside v-for that is keyed. ')
				return genElement(el, state)
			}
			return '_o(' + genElement(el, state) + ',' + state.onceId++ + ',' + key + ')'
		} else {
			return genStatic(el, state)
		}
	}

	function genIf(el, state, altGen, altEmpty) {
		el.ifProcessed = true // avoid recursion
		return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
	}

	function genIfConditions(conditions, state, altGen, altEmpty) {
		if (!conditions.length) {
			return altEmpty || '_e()'
		}

		var condition = conditions.shift()
		if (condition.exp) {
			return '(' + condition.exp + ')?' + genTernaryExp(condition.block) + ':' + genIfConditions(conditions, state, altGen, altEmpty)
		} else {
			return '' + genTernaryExp(condition.block)
		}

		// v-if with v-once should generate code like (a)?_m(0):_m(1)
		function genTernaryExp(el) {
			return altGen ? altGen(el, state) : el.once ? genOnce(el, state) : genElement(el, state)
		}
	}

	function genFor(el, state, altGen, altHelper) {
		var exp = el.for
		var alias = el.alias
		var iterator1 = el.iterator1 ? ',' + el.iterator1 : ''
		var iterator2 = el.iterator2 ? ',' + el.iterator2 : ''

		if ('development' !== 'production' && state.maybeComponent(el) && el.tag !== 'slot' && el.tag !== 'template' && !el.key) {
			state.warn(
				'<' +
					el.tag +
					' v-for="' +
					alias +
					' in ' +
					exp +
					'">: component lists rendered with ' +
					'v-for should have explicit keys. ' +
					'See https://vuejs.org/guide/list.html#key for more info.',
				true /* tip */
			)
		}

		el.forProcessed = true // avoid recursion
		return (
			(altHelper || '_l') + '((' + exp + '),' + 'function(' + alias + iterator1 + iterator2 + '){' + 'return ' + (altGen || genElement)(el, state) + '})'
		)
	}

	function genData$2(el, state) {
		var data = '{'

		// directives first.
		// directives may mutate the el's other properties before they are generated.
		var dirs = genDirectives(el, state)
		if (dirs) {
			data += dirs + ','
		}

		// key
		if (el.key) {
			data += 'key:' + el.key + ','
		}
		// ref
		if (el.ref) {
			data += 'ref:' + el.ref + ','
		}
		if (el.refInFor) {
			data += 'refInFor:true,'
		}
		// pre
		if (el.pre) {
			data += 'pre:true,'
		}
		// record original tag name for components using "is" attribute
		if (el.component) {
			data += 'tag:"' + el.tag + '",'
		}
		// module data generation functions
		for (var i = 0; i < state.dataGenFns.length; i++) {
			data += state.dataGenFns[i](el)
		}
		// attributes
		if (el.attrs) {
			data += 'attrs:{' + genProps(el.attrs) + '},'
		}
		// DOM props
		if (el.props) {
			data += 'domProps:{' + genProps(el.props) + '},'
		}
		// event handlers
		if (el.events) {
			data += genHandlers(el.events, false, state.warn) + ','
		}
		if (el.nativeEvents) {
			data += genHandlers(el.nativeEvents, true, state.warn) + ','
		}
		// slot target
		// only for non-scoped slots
		if (el.slotTarget && !el.slotScope) {
			data += 'slot:' + el.slotTarget + ','
		}
		// scoped slots
		if (el.scopedSlots) {
			data += genScopedSlots(el.scopedSlots, state) + ','
		}
		// component v-model
		if (el.model) {
			data += 'model:{value:' + el.model.value + ',callback:' + el.model.callback + ',expression:' + el.model.expression + '},'
		}
		// inline-template
		if (el.inlineTemplate) {
			var inlineTemplate = genInlineTemplate(el, state)
			if (inlineTemplate) {
				data += inlineTemplate + ','
			}
		}
		data = data.replace(/,$/, '') + '}'
		// v-bind data wrap
		if (el.wrapData) {
			data = el.wrapData(data)
		}
		// v-on data wrap
		if (el.wrapListeners) {
			data = el.wrapListeners(data)
		}
		return data
	}

	function genDirectives(el, state) {
		var dirs = el.directives
		if (!dirs) {
			return
		}
		var res = 'directives:['
		var hasRuntime = false
		var i, l, dir, needRuntime
		for (i = 0, l = dirs.length; i < l; i++) {
			dir = dirs[i]
			needRuntime = true
			var gen = state.directives[dir.name]
			if (gen) {
				// compile-time directive that manipulates AST.
				// returns true if it also needs a runtime counterpart.
				needRuntime = !!gen(el, dir, state.warn)
			}
			if (needRuntime) {
				hasRuntime = true
				res +=
					'{name:"' +
					dir.name +
					'",rawName:"' +
					dir.rawName +
					'"' +
					(dir.value ? ',value:(' + dir.value + '),expression:' + JSON.stringify(dir.value) : '') +
					(dir.arg ? ',arg:"' + dir.arg + '"' : '') +
					(dir.modifiers ? ',modifiers:' + JSON.stringify(dir.modifiers) : '') +
					'},'
			}
		}
		if (hasRuntime) {
			return res.slice(0, -1) + ']'
		}
	}

	function genInlineTemplate(el, state) {
		var ast = el.children[0]
		if ('development' !== 'production' && (el.children.length !== 1 || ast.type !== 1)) {
			state.warn('Inline-template components must have exactly one child element.')
		}
		if (ast.type === 1) {
			var inlineRenderFns = generate(ast, state.options)
			return (
				'inlineTemplate:{render:function(){' +
				inlineRenderFns.render +
				'},staticRenderFns:[' +
				inlineRenderFns.staticRenderFns
					.map(function (code) {
						return 'function(){' + code + '}'
					})
					.join(',') +
				']}'
			)
		}
	}

	function genScopedSlots(slots, state) {
		return (
			'scopedSlots:_u([' +
			Object.keys(slots)
				.map(function (key) {
					return genScopedSlot(key, slots[key], state)
				})
				.join(',') +
			'])'
		)
	}

	function genScopedSlot(key, el, state) {
		if (el.for && !el.forProcessed) {
			return genForScopedSlot(key, el, state)
		}
		var fn =
			'function(' +
			String(el.slotScope) +
			'){' +
			'return ' +
			(el.tag === 'template'
				? el.if
					? el.if + '?' + (genChildren(el, state) || 'undefined') + ':undefined'
					: genChildren(el, state) || 'undefined'
				: genElement(el, state)) +
			'}'
		return '{key:' + key + ',fn:' + fn + '}'
	}

	function genForScopedSlot(key, el, state) {
		var exp = el.for
		var alias = el.alias
		var iterator1 = el.iterator1 ? ',' + el.iterator1 : ''
		var iterator2 = el.iterator2 ? ',' + el.iterator2 : ''
		el.forProcessed = true // avoid recursion
		return '_l((' + exp + '),' + 'function(' + alias + iterator1 + iterator2 + '){' + 'return ' + genScopedSlot(key, el, state) + '})'
	}

	function genChildren(el, state, checkSkip, altGenElement, altGenNode) {
		var children = el.children
		if (children.length) {
			var el$1 = children[0]
			// optimize single v-for
			if (children.length === 1 && el$1.for && el$1.tag !== 'template' && el$1.tag !== 'slot') {
				return (altGenElement || genElement)(el$1, state)
			}
			var normalizationType = checkSkip ? getNormalizationType(children, state.maybeComponent) : 0
			var gen = altGenNode || genNode
			return (
				'[' +
				children
					.map(function (c) {
						return gen(c, state)
					})
					.join(',') +
				']' +
				(normalizationType ? ',' + normalizationType : '')
			)
		}
	}

	// determine the normalization needed for the children array.
	// 0: no normalization needed
	// 1: simple normalization needed (possible 1-level deep nested array)
	// 2: full normalization needed
	function getNormalizationType(children, maybeComponent) {
		var res = 0
		for (var i = 0; i < children.length; i++) {
			var el = children[i]
			if (el.type !== 1) {
				continue
			}
			if (
				needsNormalization(el) ||
				(el.ifConditions &&
					el.ifConditions.some(function (c) {
						return needsNormalization(c.block)
					}))
			) {
				res = 2
				break
			}
			if (
				maybeComponent(el) ||
				(el.ifConditions &&
					el.ifConditions.some(function (c) {
						return maybeComponent(c.block)
					}))
			) {
				res = 1
			}
		}
		return res
	}

	function needsNormalization(el) {
		return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
	}

	function genNode(node, state) {
		if (node.type === 1) {
			return genElement(node, state)
		}
		if (node.type === 3 && node.isComment) {
			return genComment(node)
		} else {
			return genText(node)
		}
	}

	function genText(text) {
		return (
			'_v(' +
			(text.type === 2
				? text.expression // no need for () because already wrapped in _s()
				: transformSpecialNewlines(JSON.stringify(text.text))) +
			')'
		)
	}

	function genComment(comment) {
		return '_e(' + JSON.stringify(comment.text) + ')'
	}

	function genSlot(el, state) {
		var slotName = el.slotName || '"default"'
		var children = genChildren(el, state)
		var res = '_t(' + slotName + (children ? ',' + children : '')
		var attrs =
			el.attrs &&
			'{' +
				el.attrs
					.map(function (a) {
						return camelize(a.name) + ':' + a.value
					})
					.join(',') +
				'}'
		var bind$$1 = el.attrsMap['v-bind']
		if ((attrs || bind$$1) && !children) {
			res += ',null'
		}
		if (attrs) {
			res += ',' + attrs
		}
		if (bind$$1) {
			res += (attrs ? '' : ',null') + ',' + bind$$1
		}
		return res + ')'
	}

	// componentName is el.component, take it as argument to shun flow's pessimistic refinement
	function genComponent(componentName, el, state) {
		var children = el.inlineTemplate ? null : genChildren(el, state, true)
		return '_c(' + componentName + ',' + genData$2(el, state) + (children ? ',' + children : '') + ')'
	}

	function genProps(props) {
		var res = ''
		for (var i = 0; i < props.length; i++) {
			var prop = props[i]
			/* istanbul ignore if */
			{
				res += '"' + prop.name + '":' + transformSpecialNewlines(prop.value) + ','
			}
		}
		return res.slice(0, -1)
	}

	// #3895, #4268
	function transformSpecialNewlines(text) {
		return text.replace(/\u2028/g, '\\u2028').replace(/\u2029/g, '\\u2029')
	}

	/*  */

	// these keywords should not appear inside expressions, but operators like
	// typeof, instanceof and in are allowed
	var prohibitedKeywordRE = new RegExp(
		'\\b' +
			(
				'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
				'super,throw,while,yield,delete,export,import,return,switch,default,' +
				'extends,finally,continue,debugger,function,arguments'
			)
				.split(',')
				.join('\\b|\\b') +
			'\\b'
	)

	// these unary operators should not be used as property/method names
	var unaryOperatorsRE = new RegExp('\\b' + 'delete,typeof,void'.split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)')

	// strip strings in expressions
	var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g

	// detect problematic expressions in a template
	function detectErrors(ast) {
		var errors = []
		if (ast) {
			checkNode(ast, errors)
		}
		return errors
	}

	function checkNode(node, errors) {
		if (node.type === 1) {
			for (var name in node.attrsMap) {
				if (dirRE.test(name)) {
					var value = node.attrsMap[name]
					if (value) {
						if (name === 'v-for') {
							checkFor(node, 'v-for="' + value + '"', errors)
						} else if (onRE.test(name)) {
							checkEvent(value, name + '="' + value + '"', errors)
						} else {
							checkExpression(value, name + '="' + value + '"', errors)
						}
					}
				}
			}
			if (node.children) {
				for (var i = 0; i < node.children.length; i++) {
					checkNode(node.children[i], errors)
				}
			}
		} else if (node.type === 2) {
			checkExpression(node.expression, node.text, errors)
		}
	}

	function checkEvent(exp, text, errors) {
		var stipped = exp.replace(stripStringRE, '')
		var keywordMatch = stipped.match(unaryOperatorsRE)
		if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
			errors.push('avoid using JavaScript unary operator as property name: ' + '"' + keywordMatch[0] + '" in expression ' + text.trim())
		}
		checkExpression(exp, text, errors)
	}

	function checkFor(node, text, errors) {
		checkExpression(node.for || '', text, errors)
		checkIdentifier(node.alias, 'v-for alias', text, errors)
		checkIdentifier(node.iterator1, 'v-for iterator', text, errors)
		checkIdentifier(node.iterator2, 'v-for iterator', text, errors)
	}

	function checkIdentifier(ident, type, text, errors) {
		if (typeof ident === 'string') {
			try {
				new Function('var ' + ident + '=_')
			} catch (e) {
				errors.push('invalid ' + type + ' "' + ident + '" in expression: ' + text.trim())
			}
		}
	}

	function checkExpression(exp, text, errors) {
		try {
			new Function('return ' + exp)
		} catch (e) {
			var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE)
			if (keywordMatch) {
				errors.push('avoid using JavaScript keyword as property name: ' + '"' + keywordMatch[0] + '"\n  Raw expression: ' + text.trim())
			} else {
				errors.push('invalid expression: ' + e.message + ' in\n\n' + '    ' + exp + '\n\n' + '  Raw expression: ' + text.trim() + '\n')
			}
		}
	}

	/*  */

	function createFunction(code, errors) {
		try {
			return new Function(code)
		} catch (err) {
			errors.push({ err: err, code: code })
			return noop
		}
	}

	function createCompileToFunctionFn(compile) {
		var cache = Object.create(null)

		return function compileToFunctions(template, options, vm) {
			options = extend({}, options)
			var warn$$1 = options.warn || warn
			delete options.warn

			/* istanbul ignore if */
			{
				// detect possible CSP restriction
				try {
					new Function('return 1')
				} catch (e) {
					if (e.toString().match(/unsafe-eval|CSP/)) {
						warn$$1(
							'It seems you are using the standalone build of Vue.js in an ' +
								'environment with Content Security Policy that prohibits unsafe-eval. ' +
								'The template compiler cannot work in this environment. Consider ' +
								'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
								'templates into render functions.'
						)
					}
				}
			}

			// check cache
			var key = options.delimiters ? String(options.delimiters) + template : template
			if (cache[key]) {
				return cache[key]
			}

			// compile
			var compiled = compile(template, options)

			// check compilation errors/tips
			{
				if (compiled.errors && compiled.errors.length) {
					warn$$1(
						'Error compiling template:\n\n' +
							template +
							'\n\n' +
							compiled.errors
								.map(function (e) {
									return '- ' + e
								})
								.join('\n') +
							'\n',
						vm
					)
				}
				if (compiled.tips && compiled.tips.length) {
					compiled.tips.forEach(function (msg) {
						return tip(msg, vm)
					})
				}
			}

			// turn code into functions
			var res = {}
			var fnGenErrors = []
			res.render = createFunction(compiled.render, fnGenErrors)
			res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
				return createFunction(code, fnGenErrors)
			})

			// check function generation errors.
			// this should only happen if there is a bug in the compiler itself.
			// mostly for codegen development use
			/* istanbul ignore if */
			{
				if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
					warn$$1(
						'Failed to generate render function:\n\n' +
							fnGenErrors
								.map(function (ref) {
									var err = ref.err
									var code = ref.code

									return err.toString() + ' in\n\n' + code + '\n'
								})
								.join('\n'),
						vm
					)
				}
			}

			return (cache[key] = res)
		}
	}

	/*  */

	function createCompilerCreator(baseCompile) {
		return function createCompiler(baseOptions) {
			function compile(template, options) {
				var finalOptions = Object.create(baseOptions)
				var errors = []
				var tips = []
				finalOptions.warn = function (msg, tip) {
					;(tip ? tips : errors).push(msg)
				}

				if (options) {
					// merge custom modules
					if (options.modules) {
						finalOptions.modules = (baseOptions.modules || []).concat(options.modules)
					}
					// merge custom directives
					if (options.directives) {
						finalOptions.directives = extend(Object.create(baseOptions.directives || null), options.directives)
					}
					// copy other options
					for (var key in options) {
						if (key !== 'modules' && key !== 'directives') {
							finalOptions[key] = options[key]
						}
					}
				}

				var compiled = baseCompile(template, finalOptions)
				{
					errors.push.apply(errors, detectErrors(compiled.ast))
				}
				compiled.errors = errors
				compiled.tips = tips
				return compiled
			}

			return {
				compile: compile,
				compileToFunctions: createCompileToFunctionFn(compile),
			}
		}
	}

	/*  */

	// `createCompilerCreator` allows creating compilers that use alternative
	// parser/optimizer/codegen, e.g the SSR optimizing compiler.
	// Here we just export a default compiler using the default parts.
	var createCompiler = createCompilerCreator(function baseCompile(template, options) {
		var ast = parse(template.trim(), options)
		if (options.optimize !== false) {
			optimize(ast, options)
		}
		var code = generate(ast, options)
		return {
			ast: ast,
			render: code.render,
			staticRenderFns: code.staticRenderFns,
		}
	})

	/*  */

	var ref$1 = createCompiler(baseOptions)
	var compileToFunctions = ref$1.compileToFunctions

	/*  */

	// check whether current browser encodes a char inside attribute values
	var div
	function getShouldDecode(href) {
		div = div || document.createElement('div')
		div.innerHTML = href ? '<a href="\n"/>' : '<div a="\n"/>'
		return div.innerHTML.indexOf('&#10;') > 0
	}

	// #3663: IE encodes newlines inside attribute values while other browsers don't
	var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false
	// #6828: chrome encodes content in a[href]
	var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false

	/*  */

	var idToTemplate = cached(function (id) {
		var el = query(id)
		return el && el.innerHTML
	})

	var mount = Vue.prototype.$mount
	Vue.prototype.$mount = function (el, hydrating) {
		el = el && query(el)

		/* istanbul ignore if */
		if (el === document.body || el === document.documentElement) {
			'development' !== 'production' && warn('Do not mount Vue to <html> or <body> - mount to normal elements instead.')
			return this
		}

		var options = this.$options
		// resolve template/el and convert to render function
		if (!options.render) {
			var template = options.template
			if (template) {
				if (typeof template === 'string') {
					if (template.charAt(0) === '#') {
						template = idToTemplate(template)
						/* istanbul ignore if */
						if ('development' !== 'production' && !template) {
							warn('Template element not found or is empty: ' + options.template, this)
						}
					}
				} else if (template.nodeType) {
					template = template.innerHTML
				} else {
					{
						warn('invalid template option:' + template, this)
					}
					return this
				}
			} else if (el) {
				template = getOuterHTML(el)
			}
			if (template) {
				/* istanbul ignore if */
				if ('development' !== 'production' && config.performance && mark) {
					mark('compile')
				}

				var ref = compileToFunctions(
					template,
					{
						shouldDecodeNewlines: shouldDecodeNewlines,
						shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
						delimiters: options.delimiters,
						comments: options.comments,
					},
					this
				)
				var render = ref.render
				var staticRenderFns = ref.staticRenderFns
				options.render = render
				options.staticRenderFns = staticRenderFns

				/* istanbul ignore if */
				if ('development' !== 'production' && config.performance && mark) {
					mark('compile end')
					measure('vue ' + this._name + ' compile', 'compile', 'compile end')
				}
			}
		}
		return mount.call(this, el, hydrating)
	}

	/**
	 * Get outerHTML of elements, taking care
	 * of SVG elements in IE as well.
	 */
	function getOuterHTML(el) {
		if (el.outerHTML) {
			return el.outerHTML
		} else {
			var container = document.createElement('div')
			container.appendChild(el.cloneNode(true))
			return container.innerHTML
		}
	}

	Vue.compile = compileToFunctions

	return Vue
})
